Bump devDependencies (#549)

- Removed: babel-preset-es2015@6.24.1
- Added: babel-preset-env@1.6.1
- Updated: gulp-mocha@5.0.0
- Updated: nyc@11.4.1
- Updated: vinyl-buffer@1.0.1
- Updated: vinyl-source-stream@2.0.0

gulpfile.js

@@ -74,7 +74,7 @@ task( "build:browser", () => {
     `;
 
     return browserify( "lib/peg.js", { standalone: "peg" } )
-        .transform( babelify, { presets: "es2015", compact: false } )
+        .transform( babelify, { presets: "env", compact: false } )
         .bundle()
         .pipe( source( "peg.js" ) )
         .pipe( header( HEADER ) )

package.json

@@ -34,13 +34,13 @@
         "coverage": "nyc report --reporter=text-lcov | coveralls"
     },
     "devDependencies": {
-        "babel-preset-es2015": "6.24.1",
         "babel-core": "6.26.0",
-        "dedent": "0.7.0",
+        "babel-preset-env": "1.6.1",
         "babelify": "8.0.0",
         "browserify": "14.5.0",
         "chai": "4.1.2",
         "coveralls": "3.0.0",
+        "dedent": "0.7.0",
         "del": "3.0.0",
         "eslint-config-futagozaryuu": "3.7.x",
         "express": "4.16.2",
@@ -48,15 +48,15 @@
         "gulp": "3.9.1",
         "gulp-eslint": "4.0.0",
         "gulp-header": "1.8.9",
-        "gulp-mocha": "4.3.1",
+        "gulp-mocha": "5.0.0",
         "gulp-rename": "1.2.2",
         "gulp-uglify": "3.0.0",
         "morgan": "1.9.0",
-        "nyc": "11.3.0",
+        "nyc": "11.4.1",
         "run-sequence": "2.2.0",
         "sinon": "4.1.3",
-        "vinyl-buffer": "1.0.0",
+        "vinyl-buffer": "1.0.1",
-        "vinyl-source-stream": "1.1.0"
+        "vinyl-source-stream": "2.0.0"
     },
     "engines": {
         "node": ">=4"

test/server/run

@@ -21,7 +21,7 @@ app.get( "/:dir/bundle.js", ( req, res ) => {
         `${ __dirname }/../${ req.params.dir }/**/*.js`
     ) )
         .transform( babelify, {
-            presets: "es2015",
+            presets: "env",
             compact: false
         } )
         .bundle()