diff --git a/package-lock.json b/package-lock.json
index c0795fb..c0d490e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -380,7 +380,6 @@
       "resolved": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.1.tgz",
       "integrity": "sha1-Y7xdy2EzG5K8Bf1SiVPDNGKgb40=",
       "dev": true,
-      "optional": true,
       "requires": {
         "tweetnacl": "^0.14.3"
       }
@@ -1496,7 +1495,6 @@
       "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz",
       "integrity": "sha1-D8c6ntXw1Tw4GTOYUj735UN3dQU=",
       "dev": true,
-      "optional": true,
       "requires": {
         "jsbn": "~0.1.0"
       }
@@ -5406,80 +5404,6 @@
                                       }
                                     }
                                   }
-                                },
-                                "sshpk": {
-                                  "version": "1.7.4",
-                                  "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.7.4.tgz",
-                                  "integrity": "sha1-rXtH3vymHIQV2WQkO2KwzmD7yjg=",
-                                  "dev": true,
-                                  "requires": {
-                                    "asn1": ">=0.2.3 <0.3.0",
-                                    "assert-plus": ">=0.2.0 <0.3.0",
-                                    "dashdash": ">=1.10.1 <2.0.0",
-                                    "ecc-jsbn": ">=0.0.1 <1.0.0",
-                                    "jodid25519": ">=1.0.0 <2.0.0",
-                                    "jsbn": ">=0.1.0 <0.2.0",
-                                    "tweetnacl": ">=0.13.0 <1.0.0"
-                                  },
-                                  "dependencies": {
-                                    "asn1": {
-                                      "version": "0.2.3",
-                                      "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.3.tgz",
-                                      "integrity": "sha1-2sh4dxPJlmhJ/IGAd36+nB3fO4Y=",
-                                      "dev": true
-                                    },
-                                    "dashdash": {
-                                      "version": "1.13.0",
-                                      "resolved": "https://registry.npmjs.org/dashdash/-/dashdash-1.13.0.tgz",
-                                      "integrity": "sha1-parm/Z2OFWYk6w3ZJZ6xK6JFOFo=",
-                                      "dev": true,
-                                      "requires": {
-                                        "assert-plus": "^1.0.0"
-                                      },
-                                      "dependencies": {
-                                        "assert-plus": {
-                                          "version": "1.0.0",
-                                          "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
-                                          "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
-                                          "dev": true
-                                        }
-                                      }
-                                    },
-                                    "ecc-jsbn": {
-                                      "version": "0.1.1",
-                                      "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.1.tgz",
-                                      "integrity": "sha1-D8c6ntXw1Tw4GTOYUj735UN3dQU=",
-                                      "dev": true,
-                                      "optional": true,
-                                      "requires": {
-                                        "jsbn": "~0.1.0"
-                                      }
-                                    },
-                                    "jodid25519": {
-                                      "version": "1.0.2",
-                                      "resolved": "https://registry.npmjs.org/jodid25519/-/jodid25519-1.0.2.tgz",
-                                      "integrity": "sha1-BtSRIlUJNBlHfUJWM2BuDpB4KWc=",
-                                      "dev": true,
-                                      "optional": true,
-                                      "requires": {
-                                        "jsbn": "~0.1.0"
-                                      }
-                                    },
-                                    "jsbn": {
-                                      "version": "0.1.0",
-                                      "resolved": "https://registry.npmjs.org/jsbn/-/jsbn-0.1.0.tgz",
-                                      "integrity": "sha1-ZQmH2g3XT06/WhE3eiqi0nPpff0=",
-                                      "dev": true,
-                                      "optional": true
-                                    },
-                                    "tweetnacl": {
-                                      "version": "0.14.3",
-                                      "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.3.tgz",
-                                      "integrity": "sha1-PaOC9nDyXe1417PReSEZvKC3Ey0=",
-                                      "dev": true,
-                                      "optional": true
-                                    }
-                                  }
                                 }
                               }
                             },
@@ -6667,8 +6591,7 @@
       "version": "0.1.1",
       "resolved": "https://registry.npmjs.org/jsbn/-/jsbn-0.1.1.tgz",
       "integrity": "sha1-peZUwuWi3rXyAdls77yoDA7y9RM=",
-      "dev": true,
-      "optional": true
+      "dev": true
     },
     "jschardet": {
       "version": "1.4.2",
@@ -8669,6 +8592,12 @@
         "ret": "~0.1.10"
       }
     },
+    "safer-buffer": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
+      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
+      "dev": true
+    },
     "samsam": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/samsam/-/samsam-1.1.2.tgz",
@@ -8972,9 +8901,9 @@
       "integrity": "sha1-Nr54Mgr+WAH2zqPueLblqrlA6gw="
     },
     "sshpk": {
-      "version": "1.13.1",
-      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.13.1.tgz",
-      "integrity": "sha1-US322mKHFEMW3EwY/hzx2UBzm+M=",
+      "version": "1.16.1",
+      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.16.1.tgz",
+      "integrity": "sha512-HXXqVUq7+pcKeLqqZj6mHFUMvXtOJt1uoUx09pFW6011inTMxqI8BA8PM95myrIyyKwdnzjdFjLiE6KBPVtJIg==",
       "dev": true,
       "requires": {
         "asn1": "~0.2.3",
@@ -8984,6 +8913,7 @@
         "ecc-jsbn": "~0.1.1",
         "getpass": "^0.1.1",
         "jsbn": "~0.1.0",
+        "safer-buffer": "^2.0.2",
         "tweetnacl": "~0.14.0"
       },
       "dependencies": {
@@ -9451,8 +9381,7 @@
       "version": "0.14.5",
       "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
       "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
-      "dev": true,
-      "optional": true
+      "dev": true
     },
     "type-check": {
       "version": "0.3.2",