Build: Update dev dependencies (rimraf, rollup, fixturify)

This also bumps Babel plugin ranges to match those that we've
already committed in the lock file as of 4ae239e.

* rimraf: major version, dropped support for Node 8.
* rollup: ran build/review-package.js, no changes.
* fixturify: major version, dropped support for Node 8.

package.json

@@ -48,19 +48,19 @@
   },
   "devDependencies": {
     "@babel/core": "^7.13.15",
-    "@babel/plugin-external-helpers": "^7.10.4",
-    "@babel/preset-env": "^7.11.5",
+    "@babel/plugin-external-helpers": "^7.12.13",
+    "@babel/preset-env": "^7.13.15",
     "@rollup/plugin-babel": "^5.3.0",
     "@rollup/plugin-commonjs": "^18.0.0",
     "@rollup/plugin-node-resolve": "^11.2.1",
-    "@rollup/plugin-replace": "^2.3.4",
+    "@rollup/plugin-replace": "^2.4.2",
     "coveralls": "^3.1.0",
     "eslint-config-jquery": "^3.0.0",
     "eslint-plugin-html": "^6.1.2",
     "eslint-plugin-node": "^11.1.0",
     "eslint-plugin-qunit": "^6.0.0",
     "execa": "0.8.0",
-    "fixturify": "0.3.4",
+    "fixturify": "^2.1.0",
     "fuzzysort": "^1.1.4",
     "grunt": "^1.3.0",
     "grunt-contrib-connect": "^3.0.0",
@@ -73,8 +73,8 @@
     "nyc": "^15.1.0",
     "proxyquire": "^1.8.0",
     "requirejs": "^2.3.6",
-    "rimraf": "^2.7.1",
-    "rollup": "^2.45.0",
+    "rimraf": "^3.0.2",
+    "rollup": "^2.45.1",
     "semver": "^7.3.5"
   },
   "scripts": {