Bump copyfiles from 1.2.0 to 2.0.0

Bumps [copyfiles](https://github.com/calvinmetcalf/copyfiles) from 1.2.0 to 2.0.0.
- [Release notes](https://github.com/calvinmetcalf/copyfiles/releases)
- [Commits](https://github.com/calvinmetcalf/copyfiles/compare/v1.2.0...v2.0.0)

Signed-off-by: dependabot[bot] <support@dependabot.com>

packages/dev-utils/package.json

@@ -35,7 +35,7 @@
         "@types/lodash": "4.14.104",
         "@types/mocha": "^2.2.42",
         "chai": "^4.0.1",
-        "copyfiles": "^1.2.0",
+        "copyfiles": "^2.0.0",
         "make-promises-safe": "^1.1.0",
         "mocha": "^4.1.0",
         "npm-run-all": "^4.1.2",