fix: use official createHash for hashes (#1618)

Author: alexander-akait

src/utils.js

@@ -327,8 +327,12 @@ function defaultGetLocalIdent(
   let localIdentHash = "";
 
   for (let tier = 0; localIdentHash.length < hashDigestLength; tier++) {
-    // eslint-disable-next-line no-underscore-dangle
-    const hash = loaderContext._compiler.webpack.util.createHash(hashFunction);
+    const hash = (
+      loaderContext.utils.createHash ||
+      // TODO remove in the next major release
+      // eslint-disable-next-line no-underscore-dangle
+      loaderContext._compiler.webpack.util.createHash
+    )(hashFunction);
 
     if (hashSalt) {
       hash.update(hashSalt);