Build: Run pretest before test:* npm scripts

Build was already happening in scripts like `test:browser` but those scripts
were missing `pretest`, meaning that running `npm install && npm test:browser`
may have failed if `pretest` wasn't run before or if its results were out of
date.

Even worse, with such stale data some tests may erroneously succeed.

This also removes a separate `pretest` step from GitHub Actions as it's no
longer needed.

Closes gh-5338

.github/workflows/node.js.yml

@@ -74,9 +74,6 @@ jobs:
       run: npm run build:all && npm run lint
       if: matrix.NODE_VERSION == '18.x'
 
-    - name: Prepare tests
-      run: npm run pretest
-
     - name: Run tests
       env:
         BROWSERS: ${{ matrix.BROWSERS }}

package.json

@@ -52,14 +52,14 @@
     "pretest": "npm run qunit-fixture && npm run babel:tests && npm run npmcopy",
     "qunit-fixture": "node build/tasks/qunit-fixture.js",
     "start": "node -e \"require('./build/tasks/build.js').buildDefaultFiles({ watch: true })\"",
-    "test:browserless": "npm run test:node_smoke_tests && npm run test:promises_aplus && npm run test:jsdom",
-    "test:browser": "npm run build:all && grunt karma:main",
-    "test:esmodules": "npm run build:main && grunt karma:esmodules",
-    "test:jsdom": "npm run build:main && grunt test:jsdom",
-    "test:no-deprecated": "npm run build -- -e deprecated && grunt karma:main",
-    "test:selector-native": "npm run build -- -e selector && grunt karma:main",
-    "test:slim": "npm run build -- --slim && grunt karma:main",
-    "test:node_smoke_tests": "npm run build:all && node build/tasks/node_smoke_tests.js",
+    "test:browserless": "npm run pretest && npm run test:node_smoke_tests && npm run test:promises_aplus && npm run test:jsdom",
+    "test:browser": "npm run pretest && npm run build:all && grunt karma:main",
+    "test:esmodules": "npm run pretest && npm run build:main && grunt karma:esmodules",
+    "test:jsdom": "npm run pretest && npm run build:main && grunt test:jsdom",
+    "test:no-deprecated": "npm run pretest && npm run build -- -e deprecated && grunt karma:main",
+    "test:selector-native": "npm run pretest && npm run build -- -e selector && grunt karma:main",
+    "test:slim": "npm run pretest && npm run build -- --slim && grunt karma:main",
+    "test:node_smoke_tests": "npm run pretest && npm run build:all && node build/tasks/node_smoke_tests.js",
     "test:promises_aplus": "npm run build:main && node build/tasks/promises_aplus_tests.js",
     "test": "npm run build:all && npm run lint && npm run test:browserless && npm run test:browser && npm run test:esmodules && npm run test:slim && npm run test:no-deprecated && npm run test:selector-native"
   },