fix: upgrade frontend-build for i18n extract fix (#36)

Author: Adam Butterworth

package-lock.json

@@ -38,7 +38,7 @@
     "@commitlint/config-angular": "8.2.0",
     "@commitlint/prompt": "8.2.0",
     "@commitlint/prompt-cli": "8.2.0",
-    "@edx/frontend-build": "2.0.3",
+    "@edx/frontend-build": "^2.0.4",
     "@edx/frontend-platform": "1.1.4",
     "@edx/paragon": "7.1.4",
     "codecov": "3.6.1",