fix: throw error when options of cache-loader contains !

Author: ulivz

Diff for: lib/loaders/pitcher.js

@@ -74,7 +74,7 @@ module.exports.pitch = function (remainingRequest) {
     const cacheLoader = cacheDirectory && cacheIdentifier
       ? [`cache-loader?${JSON.stringify({
         cacheDirectory,
-        cacheIdentifier: cacheIdentifier + '-vue-loader-template'
+        cacheIdentifier: cacheIdentifier.replace(/!/g, '') + '-vue-loader-template'
       })}`]
       : []
     const request = genRequest([