Use modules for docs

package.json

@@ -55,7 +55,7 @@
     "build:src": "tsc --project src && node scripts/copycss.js",
     "build:test": "cd test && tsc --project src && webpack --config webpack.conf.js",
     "build": "npm run build:src && npm run build:test",
-    "docs": "typedoc --mode file --module commonjs --excludeNotExported --target es5 --moduleResolution node --out docs/ src",
+    "docs": "typedoc --mode modules --module commonjs --excludeNotExported --target es5 --moduleResolution node --out docs/ src",
     "prepublish": "npm run build",
     "postinstall": "npm dedupe",
     "test:chrome": "karma start --browsers=Chrome test/karma.conf.js",