Merge pull request #3155 from scratchfoundation/renovate/scratch-l10n-3.x

fix(deps): update dependency scratch-l10n to v3.18.3

Author: renovate[bot]

package-lock.json

@@ -29,7 +29,7 @@
     "exports-loader": "0.7.0",
     "google-closure-library": "20190301.0.0",
     "imports-loader": "0.8.0",
-    "scratch-l10n": "3.18.1"
+    "scratch-l10n": "3.18.3"
   },
   "devDependencies": {
     "@commitlint/cli": "18.6.0",