chore: Test ES6 sources directly

Author: prantlf

.babelrc

@@ -3,7 +3,6 @@
     [
       "@babel/preset-env",
       {
-        "modules": false,
         "loose": true
       }
     ]

.travis.yml

@@ -8,6 +8,7 @@ notifications:
 node_js:
   - '10'
   - '8'
+  - '6'
 after_success:
   - npm run coverage
   - npm run travis-deploy-once "npm run semantic-release"

.vscode/launch.json

@@ -15,7 +15,6 @@
         "browser.test.js"
       ],
       "internalConsoleOptions": "openOnSessionStart",
-      "preLaunchTask": "build:debug",
       "skipFiles": [
         "<node_internals>/**/*.js"
       ]

.vscode/tasks.json

@@ -13,12 +13,6 @@
         "isDefault": true
       }
     },
-    {
-      "label": "build:debug",
-      "type": "npm",
-      "script": "build:debug",
-      "problemMatcher": []
-    },
     {
       "label": "test",
       "type": "npm",
@@ -30,4 +24,4 @@
       }
     },
   ]
-}
+}