Build: Upgrade loader-utils to 2.0.3 in storysource and source-loader to resolve a critical security issue found by npm audit

Author: Mukund Katpatal

addons/storysource/package.json

@@ -50,7 +50,7 @@
     "@storybook/theming": "6.5.13",
     "core-js": "^3.8.2",
     "estraverse": "^5.2.0",
-    "loader-utils": "^2.0.0",
+    "loader-utils": "^2.0.3",
     "prop-types": "^15.7.2",
     "react-syntax-highlighter": "^15.4.5",
     "regenerator-runtime": "^0.13.7"

lib/source-loader/package.json

@@ -47,7 +47,7 @@
     "core-js": "^3.8.2",
     "estraverse": "^5.2.0",
     "global": "^4.4.0",
-    "loader-utils": "^2.0.0",
+    "loader-utils": "^2.0.3",
     "lodash": "^4.17.21",
     "prettier": ">=2.2.1 <=2.3.0",
     "regenerator-runtime": "^0.13.7"