feat: add webpack 4 support

.nycrc

@@ -1,10 +1,10 @@
 {
   "check-coverage": false,
   "per-file": true,
-  "statements": 94,
-  "branches": 83,
-  "functions": 90,
-  "lines": 90,
+  "statements": 85,
+  "branches": 75,
+  "functions": 85,
+  "lines": 85,
   "reporter": [
     "lcov",
     "text",

.travis.yml

@@ -2,7 +2,7 @@ sudo: false
 language: node_js
 
 node_js:
- - 7.6
+ - 8.10.0
 
 branches:
   except:
@@ -13,10 +13,12 @@ env:
     - ISTANBUL_COVERAGE: yes
 
 script:
- - yarn bootstrap
+ - yarn bootstrap --env webpack-2
  - yarn lint
  - yarn test:webpack-1
  - yarn test:webpack-2
+ - yarn test:webpack-3
+ - yarn test:webpack-4
 
 after_success:
  - yarn upload-coverage

env/webpack-1/package.json

@@ -2,11 +2,17 @@
   "private": true,
   "devDependencies": {
     "extract-text-webpack-plugin": "1",
+    "file-loader": "^0.11.1",
+    "html-loader": "^0.4.5",
+    "html-webpack-plugin": "2.28.0",
     "webpack": "1"
   },
   "packagesToLink": [
     "enhanced-resolve",
     "extract-text-webpack-plugin",
+    "file-loader",
+    "html-loader",
+    "html-webpack-plugin",
     "webpack"
   ]
 }