update webpack dep

Author: Jeff Escalante

package.json

@@ -28,7 +28,7 @@
     "source-loader": "^1.0.0",
     "spike-util": "^1.3.0",
     "sprout": "^1.2.1",
-    "webpack": "^3.8.1",
+    "webpack": "^3.12.0",
     "when": "^3.7.8"
   },
   "devDependencies": {
@@ -52,17 +52,14 @@
     "npm": ">=3.8.0"
   },
   "homepage": "https://github.com/static-dev/spike-core",
-  "keywords": [
-    "spike",
-    "static",
-    "webpack"
-  ],
+  "keywords": ["spike", "static", "webpack"],
   "license": "MIT",
   "main": "lib",
   "repository": "static-dev/spike",
   "scripts": {
     "coverage": "nyc --reporter=html ava && open coverage/index.html",
-    "coveralls": "nyc --reporter=lcov ava && cat ./coverage/lcov.info | coveralls",
+    "coveralls":
+      "nyc --reporter=lcov ava && cat ./coverage/lcov.info | coveralls",
     "lint": "standard --verbose | snazzy",
     "precommit": "npm run lint -s",
     "pretest": "npm run lint -s",