diff --git a/package-lock.json b/package-lock.json
index b786cca..510e20d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -739,7 +739,7 @@
     "babel-plugin-syntax-flow": {
       "version": "6.18.0",
       "resolved": "https://registry.npmjs.org/babel-plugin-syntax-flow/-/babel-plugin-syntax-flow-6.18.0.tgz",
-      "integrity": "sha1-TDqyCiryaqIM0lmVw5jE63AxDI0="
+      "integrity": "sha512-HbTDIoG1A1op7Tl/wIFQPULIBA61tsJ8Ntq2FAhLwuijrzosM/92kAfgU1Q3Kc7DH/cprJg5vDfuTY4QUL4rDA=="
     },
     "babel-plugin-syntax-function-bind": {
       "version": "6.13.0",
@@ -1096,7 +1096,7 @@
     "babel-plugin-transform-flow-strip-types": {
       "version": "6.22.0",
       "resolved": "https://registry.npmjs.org/babel-plugin-transform-flow-strip-types/-/babel-plugin-transform-flow-strip-types-6.22.0.tgz",
-      "integrity": "sha1-hMtnKTXUNxT9wyvOhFaNh0Qc988=",
+      "integrity": "sha512-TxIM0ZWNw9oYsoTthL3lvAK3+eTujzktoXJg4ubGvICGbVuXVYv5hHv0XXpz8fbqlJaGYY4q5SVzaSmsg3t4Fg==",
       "requires": {
         "babel-plugin-syntax-flow": "^6.18.0",
         "babel-runtime": "^6.22.0"
@@ -1153,7 +1153,7 @@
     "babel-polyfill": {
       "version": "6.26.0",
       "resolved": "https://registry.npmjs.org/babel-polyfill/-/babel-polyfill-6.26.0.tgz",
-      "integrity": "sha1-N5k3q8Z9eJWXCtxiHyhM2WbPIVM=",
+      "integrity": "sha512-F2rZGQnAdaHWQ8YAoeRbukc7HS9QgdgeyJ0rQDd485v9opwuPvjpPFcOOT/WmkKTdgy9ESgSPXDcTNpzrGr6iQ==",
       "requires": {
         "babel-runtime": "^6.26.0",
         "core-js": "^2.5.0",
@@ -1163,7 +1163,7 @@
         "regenerator-runtime": {
           "version": "0.10.5",
           "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.10.5.tgz",
-          "integrity": "sha1-M2w+/BIgrc7dosn6tntaeVWjNlg="
+          "integrity": "sha512-02YopEIhAgiBHWeoTiA8aitHDt8z6w+rQqNuIftlM+ZtvSl/brTouaU7DW6GO/cHtvxJvS4Hwv2ibKdxIRi24w=="
         }
       }
     },
@@ -1264,7 +1264,7 @@
     "babel-runtime": {
       "version": "6.26.0",
       "resolved": "https://registry.npmjs.org/babel-runtime/-/babel-runtime-6.26.0.tgz",
-      "integrity": "sha1-llxwWGaOgrVde/4E/yM3vItWR/4=",
+      "integrity": "sha512-ITKNuq2wKlW1fJg9sSW52eepoYgZBggvOAHC0u/CYu/qxQ9EVzThCgR69BnSXLHjy2f7SY5zaQ4yt7H9ZVxY2g==",
       "requires": {
         "core-js": "^2.4.0",
         "regenerator-runtime": "^0.11.0"
@@ -1429,18 +1429,140 @@
       }
     },
     "browserify-sign": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/browserify-sign/-/browserify-sign-4.0.0.tgz",
-      "integrity": "sha1-EHc5EMPCBtVCCkaq2GlPgguFlo8=",
+      "version": "4.2.2",
+      "resolved": "https://registry.npmjs.org/browserify-sign/-/browserify-sign-4.2.2.tgz",
+      "integrity": "sha512-1rudGyeYY42Dk6texmv7c4VcQ0EsvVbLwZkA+AQB7SxvXxmcD93jcHie8bzecJ+ChDlmAm2Qyu0+Ccg5uhZXCg==",
       "dev": true,
       "requires": {
-        "bn.js": "^4.1.1",
-        "browserify-rsa": "^4.0.0",
-        "create-hash": "^1.1.0",
-        "create-hmac": "^1.1.2",
-        "elliptic": "^6.0.0",
-        "inherits": "^2.0.1",
-        "parse-asn1": "^5.0.0"
+        "bn.js": "^5.2.1",
+        "browserify-rsa": "^4.1.0",
+        "create-hash": "^1.2.0",
+        "create-hmac": "^1.1.7",
+        "elliptic": "^6.5.4",
+        "inherits": "^2.0.4",
+        "parse-asn1": "^5.1.6",
+        "readable-stream": "^3.6.2",
+        "safe-buffer": "^5.2.1"
+      },
+      "dependencies": {
+        "asn1.js": {
+          "version": "5.4.1",
+          "resolved": "https://registry.npmjs.org/asn1.js/-/asn1.js-5.4.1.tgz",
+          "integrity": "sha512-+I//4cYPccV8LdmBLiX8CYvf9Sp3vQsrqu2QNXRcrbiWvcx/UdlFiqUJJzxRQxgsZmvhXhn4cSKeSmoFjVdupA==",
+          "dev": true,
+          "requires": {
+            "bn.js": "^4.0.0",
+            "inherits": "^2.0.1",
+            "minimalistic-assert": "^1.0.0",
+            "safer-buffer": "^2.1.0"
+          },
+          "dependencies": {
+            "bn.js": {
+              "version": "4.12.0",
+              "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-4.12.0.tgz",
+              "integrity": "sha512-c98Bf3tPniI+scsdk237ku1Dc3ujXQTSgyiPUDEOe7tRkhrqridvh8klBv0HCEso1OLOYcHuCv/cS6DNxKH+ZA==",
+              "dev": true
+            }
+          }
+        },
+        "bn.js": {
+          "version": "5.2.1",
+          "resolved": "https://registry.npmjs.org/bn.js/-/bn.js-5.2.1.tgz",
+          "integrity": "sha512-eXRvHzWyYPBuB4NBy0cmYQjGitUrtqwbvlzP3G6VFnNRbsZQIxQ10PbKKHt8gZ/HW/D/747aDl+QkDqg3KQLMQ==",
+          "dev": true
+        },
+        "browserify-rsa": {
+          "version": "4.1.0",
+          "resolved": "https://registry.npmjs.org/browserify-rsa/-/browserify-rsa-4.1.0.tgz",
+          "integrity": "sha512-AdEER0Hkspgno2aR97SAf6vi0y0k8NuOpGnVH3O99rcA5Q6sh8QxcngtHuJ6uXwnfAXNM4Gn1Gb7/MV1+Ymbog==",
+          "dev": true,
+          "requires": {
+            "bn.js": "^5.0.0",
+            "randombytes": "^2.0.1"
+          }
+        },
+        "create-hash": {
+          "version": "1.2.0",
+          "resolved": "https://registry.npmjs.org/create-hash/-/create-hash-1.2.0.tgz",
+          "integrity": "sha512-z00bCGNHDG8mHAkP7CtT1qVu+bFQUPjYq/4Iv3C3kWjTFV10zIjfSoeqXo9Asws8gwSHDGj/hl2u4OGIjapeCg==",
+          "dev": true,
+          "requires": {
+            "cipher-base": "^1.0.1",
+            "inherits": "^2.0.1",
+            "md5.js": "^1.3.4",
+            "ripemd160": "^2.0.1",
+            "sha.js": "^2.4.0"
+          }
+        },
+        "create-hmac": {
+          "version": "1.1.7",
+          "resolved": "https://registry.npmjs.org/create-hmac/-/create-hmac-1.1.7.tgz",
+          "integrity": "sha512-MJG9liiZ+ogc4TzUwuvbER1JRdgvUFSB5+VR/g5h82fGaIRWMWddtKBHi7/sVhfjQZ6SehlyhvQYrcYkaUIpLg==",
+          "dev": true,
+          "requires": {
+            "cipher-base": "^1.0.3",
+            "create-hash": "^1.1.0",
+            "inherits": "^2.0.1",
+            "ripemd160": "^2.0.0",
+            "safe-buffer": "^5.0.1",
+            "sha.js": "^2.4.8"
+          }
+        },
+        "inherits": {
+          "version": "2.0.4",
+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+          "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
+          "dev": true
+        },
+        "parse-asn1": {
+          "version": "5.1.6",
+          "resolved": "https://registry.npmjs.org/parse-asn1/-/parse-asn1-5.1.6.tgz",
+          "integrity": "sha512-RnZRo1EPU6JBnra2vGHj0yhp6ebyjBZpmUCLHWiFhxlzvBCCpAuZ7elsBp1PVAbQN0/04VD/19rfzlBSwLstMw==",
+          "dev": true,
+          "requires": {
+            "asn1.js": "^5.2.0",
+            "browserify-aes": "^1.0.0",
+            "evp_bytestokey": "^1.0.0",
+            "pbkdf2": "^3.0.3",
+            "safe-buffer": "^5.1.1"
+          }
+        },
+        "readable-stream": {
+          "version": "3.6.2",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.2.tgz",
+          "integrity": "sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA==",
+          "dev": true,
+          "requires": {
+            "inherits": "^2.0.3",
+            "string_decoder": "^1.1.1",
+            "util-deprecate": "^1.0.1"
+          }
+        },
+        "ripemd160": {
+          "version": "2.0.2",
+          "resolved": "https://registry.npmjs.org/ripemd160/-/ripemd160-2.0.2.tgz",
+          "integrity": "sha512-ii4iagi25WusVoiC4B4lq7pbXfAp3D9v5CwfkY33vffw2+pkDjY1D8GaN7spsxvCSx8dkPqOZCEZyfxcmJG2IA==",
+          "dev": true,
+          "requires": {
+            "hash-base": "^3.0.0",
+            "inherits": "^2.0.1"
+          }
+        },
+        "safe-buffer": {
+          "version": "5.2.1",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+          "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==",
+          "dev": true
+        },
+        "string_decoder": {
+          "version": "1.3.0",
+          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
+          "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
+          "dev": true,
+          "requires": {
+            "safe-buffer": "~5.2.0"
+          }
+        }
       }
     },
     "browserify-zlib": {
@@ -3199,6 +3321,51 @@
       "integrity": "sha1-uhqPGvKg/DllD1yFA2dwQSIGO0Q=",
       "dev": true
     },
+    "hash-base": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/hash-base/-/hash-base-3.1.0.tgz",
+      "integrity": "sha512-1nmYp/rhMDiE7AYkDw+lLwlAzz0AntGIe51F3RfFfEqyQ3feY2eI/NcwC6umIQVOASPMsWJLJScWKSSvzL9IVA==",
+      "dev": true,
+      "requires": {
+        "inherits": "^2.0.4",
+        "readable-stream": "^3.6.0",
+        "safe-buffer": "^5.2.0"
+      },
+      "dependencies": {
+        "inherits": {
+          "version": "2.0.4",
+          "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+          "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
+          "dev": true
+        },
+        "readable-stream": {
+          "version": "3.6.2",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.2.tgz",
+          "integrity": "sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA==",
+          "dev": true,
+          "requires": {
+            "inherits": "^2.0.3",
+            "string_decoder": "^1.1.1",
+            "util-deprecate": "^1.0.1"
+          }
+        },
+        "safe-buffer": {
+          "version": "5.2.1",
+          "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+          "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==",
+          "dev": true
+        },
+        "string_decoder": {
+          "version": "1.3.0",
+          "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
+          "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
+          "dev": true,
+          "requires": {
+            "safe-buffer": "~5.2.0"
+          }
+        }
+      }
+    },
     "hash.js": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/hash.js/-/hash.js-1.0.3.tgz",
@@ -3844,6 +4011,17 @@
         }
       }
     },
+    "md5.js": {
+      "version": "1.3.5",
+      "resolved": "https://registry.npmjs.org/md5.js/-/md5.js-1.3.5.tgz",
+      "integrity": "sha512-xitP+WxNPcTTOgnTJcrhM0xvdPepipPSf3I8EIpGKeFLjt3PlJLIDG3u8EX53ZIubkb+5U2+3rELYpEhHhzdkg==",
+      "dev": true,
+      "requires": {
+        "hash-base": "^3.0.0",
+        "inherits": "^2.0.1",
+        "safe-buffer": "^5.1.2"
+      }
+    },
     "memory-fs": {
       "version": "0.4.1",
       "resolved": "https://registry.npmjs.org/memory-fs/-/memory-fs-0.4.1.tgz",