fix: lib/core/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-CACHEBASE-1054631

lib/core/package.json

@@ -90,7 +90,7 @@
     "file-loader": "^6.0.0",
     "file-system-cache": "^1.0.5",
     "find-up": "^4.1.0",
-    "fork-ts-checker-webpack-plugin": "^4.1.4",
+    "fork-ts-checker-webpack-plugin": "^5.0.0",
     "fs-extra": "^9.0.0",
     "glob": "^7.1.6",
     "glob-base": "^0.3.0",
@@ -123,7 +123,7 @@
     "unfetch": "^4.1.0",
     "url-loader": "^4.0.0",
     "util-deprecate": "^1.0.2",
-    "webpack": "^4.43.0",
+    "webpack": "^5.0.0",
     "webpack-dev-middleware": "^3.7.0",
     "webpack-hot-middleware": "^2.25.0",
     "webpack-virtual-modules": "^0.2.2"