Update builds

Update custom-elements, shadydom, and shadycss
Update closure compiler to 20171112
Allow `gulp` to use `npm link`'d packages for testing

Author: dfreedm

gulpfile.js

@@ -73,8 +73,10 @@ function closurify(sourceName, fileName) {
       'src/*.js',
       'node_modules/es6-promise/lib/es6-promise/**/*.js',
       'node_modules/@webcomponents/**/*.js',
-      '!node_modules/@webcomponents/*/externs/*.js'
-    ], {base: './'})
+      '!node_modules/@webcomponents/*/externs/*.js',
+      '!node_modules/@webcomponents/*/node_modules/**',
+      '!**/bower_components/**'
+    ], {base: './', follow: true})
   .pipe(sourcemaps.init())
   .pipe(closure(closureOptions))
   .pipe(sourcemaps.write('.'))

package-lock.json

@@ -27,17 +27,17 @@
   },
   "homepage": "https://webcomponents.org/polyfills",
   "devDependencies": {
-    "@webcomponents/custom-elements": "^1.0.4",
+    "@webcomponents/custom-elements": "^1.0.6",
     "@webcomponents/html-imports": "^1.0.3",
-    "@webcomponents/shadycss": "^1.0.6",
-    "@webcomponents/shadydom": "^1.0.6",
+    "@webcomponents/shadycss": "^1.1.0",
+    "@webcomponents/shadydom": "^1.0.8",
     "@webcomponents/template": "^1.2.0",
     "@webcomponents/webcomponents-platform": "^1.0.0",
     "babel-preset-minify": "^0.2.0",
     "del": "^3.0.0",
     "es6-promise": "^4.1.1",
-    "eslint": "^4.10.0",
-    "google-closure-compiler": "^20171023.0.1",
+    "eslint": "^4.11.0",
+    "google-closure-compiler": "^20171112.0.0",
     "gulp": "^3.8.8",
     "gulp-add-src": "^0.2.0",
     "gulp-header": "^1.8.9",