Add polyfill for path to fix a bug that prevented the results view from being loaded (#842)

* Add a polyfill for the Node.js path module

Webpack >v5 doesn't include polyfills for core modules from Node.js by
default. Since we use `path` in the results table UI, we need to include
our own polyfill. This commit adds `path-browserify` to the
distributed extension.

As future work, we could move SARIF location rendering into the core
extension so we don't need to use `path.basename` in the UI. This would
allow us to remove the polyfill.

* Add changelog note

Author: henrymercer

extensions/ql-vscode/CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## [UNRELEASED]
 
+- Fix a bug that prevented the results view from being loaded. [#842](https://github.com/github/vscode-codeql/pull/842)
+
 ## 1.4.6 - 21 April 2021
 
 - Avoid showing an error popup when running a query with `@kind table` metadata. [#814](https://github.com/github/vscode-codeql/pull/814)

extensions/ql-vscode/gulpfile.ts/webpack.config.ts

@@ -15,7 +15,7 @@ export const config: webpack.Configuration = {
   resolve: {
     extensions: ['.js', '.ts', '.tsx', '.json'],
     fallback: {
-      path: false
+      path: require.resolve('path-browserify')
     }
   },
   module: {

extensions/ql-vscode/package-lock.json

@@ -853,6 +853,7 @@
     "js-yaml": "^3.14.0",
     "minimist": "~1.2.5",
     "node-fetch": "~2.6.0",
+    "path-browserify": "^1.0.1",
     "react": "^16.8.6",
     "react-dom": "^16.8.6",
     "semver": "~7.3.2",