fix: normalize source map file path on windows

Updated test snapshot file.
1. Sources paths was cleaned up by upgrading component-compiler-utils.
2. Styles mapping changes are due to newer version of postcss (from component-compiler-utils).
3. postcss rawResult is removed.
 * The rawResult contains ast tree which postcss always prepends current working directory to referencing file name.
 * This is a main pain point of maintaining this snapshot test.
 * The correctness of rawResult is responsibility of postcss, not vue compiler. So it's irrelevant to test it here.

This is a companion PR for vuejs/component-compiler-utils#51

Author: 3cp

package.json

@@ -57,7 +57,7 @@
     "vue-template-compiler": "*"
   },
   "dependencies": {
-    "@vue/component-compiler-utils": "^2.5.0",
+    "@vue/component-compiler-utils": "^2.5.2",
     "clean-css": "^4.1.11",
     "hash-sum": "^1.0.2",
     "postcss-modules-sync": "^1.0.0",

src/assembler.ts

@@ -74,7 +74,7 @@ export function assembleFromSource(
   script = script || { source: 'export default {}' }
   template = template || { source: '' }
   let map = undefined
-  const mapGenerator = new SourceMapGenerator({ file: filename })
+  const mapGenerator = new SourceMapGenerator({ file: filename.replace(/\\/g, '/') })
 
   const hasScopedStyle = styles.some(style => style.scoped === true)
   const hasStyle = styles.some(style => style.source || style.module)