Fix TravisCI

* Updated developer dependencies
* Updated ESLint rules

Author: whitlockjc

.eslintrc

@@ -7,6 +7,9 @@
   env:
     node: true
 
+  globals:
+    Promise: true
+
   rules:
     array-bracket-spacing: [2, "never"]
     brace-style: [2, "1tbs"]
@@ -16,6 +19,7 @@
     default-case: 2
     func-style: [2, "declaration"]
     guard-for-in: 2
+    keyword-spacing: 2
     newline-after-var: 2
     no-floating-decimal: 2
     no-inner-declarations: [2, "both"]
@@ -28,7 +32,6 @@
     quotes: [2, "single", "avoid-escape"]
     radix: 2
     semi: [2, "always"]
-    space-after-keywords: [2, "always"]
     space-before-blocks: [2, "always"]
     space-before-function-paren: [2, "always"]
     space-in-parens: [2, "never"]