Fix dependabot warnings (#816)

This commit updates to webpack 5 in order to fix some dependabot errors.
Because webpack 5 introduces some breaking changes, this commit also
makes some minor changes to the build code.

Author: aeisenberg

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

@@ -13,7 +13,10 @@ export const config: webpack.Configuration = {
   },
   devtool: 'inline-source-map',
   resolve: {
-    extensions: ['.js', '.ts', '.tsx', '.json']
+    extensions: ['.js', '.ts', '.tsx', '.json'],
+    fallback: {
+      path: false
+    }
   },
   module: {
     rules: [

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

@@ -6,21 +6,23 @@ export function compileView(cb: (err?: Error) => void) {
     if (error) {
       cb(error);
     }
-    console.log(stats.toString({
-      errorDetails: true,
-      colors: true,
-      assets: false,
-      builtAt: false,
-      version: false,
-      hash: false,
-      entrypoints: false,
-      timings: false,
-      modules: false,
-      errors: true
-    }));
-    if (stats.hasErrors()) {
-      cb(new Error('Compilation errors detected.'));
-      return;
+    if (stats) {
+      console.log(stats.toString({
+        errorDetails: true,
+        colors: true,
+        assets: false,
+        builtAt: false,
+        version: false,
+        hash: false,
+        entrypoints: false,
+        timings: false,
+        modules: false,
+        errors: true
+      }));
+      if (stats.hasErrors()) {
+        cb(new Error('Compilation errors detected.'));
+        return;
+      }
     }
 
     cb();