Move from cp to copyfiles. Fixes #198.

package.json

@@ -27,17 +27,17 @@
     "ts": "tsc --build tsconfig.json",
     "test": "jest",
     "benchmark": "node ./benchmark/run_bench.js",
-    "rollup": "cp package.json build/ts && rollup -c",
+    "rollup": "copyfiles package.json build/ts && rollup -c",
     "terser": "npm run terser:peggy && npm run terser:tests && npm run terser:bench",
     "terser:peggy": "terser -c passes=2 -m --sequences 40 build/rollup/peggy.umd.js -o build/peggy.min.js",
     "terser:tests": "terser -c passes=2 -m --sequences 40 --module build/rollup/test.umd.js -o build/test-bundle.min.js",
     "terser:bench": "terser -c passes=2 -m --sequences 40 --module build/rollup/benchmark.umd.js -o build/benchmark-bundle.min.js",
     "headers": "node ./tools/header.js build/peggy.min.js build/benchmark-bundle.min.js build/test-bundle.min.js",
     "deploy": "npm run deploy:peggy && npm run deploy:tests && npm run deploy:bench",
     "coverage:bin": "PEGGY_CLI_DEBUG=1 npm run rollup && nyc --reporter lcov jest run.spec.ts",
-    "deploy:peggy": "cp build/peggy.min.js docs/vendor/peggy/peggy.min.js && cp build/peggy.min.js browser/peggy.min.js",
-    "deploy:tests": "cp build/test-bundle.min.js docs/js/test-bundle.min.js",
-    "deploy:bench": "cp build/benchmark-bundle.min.js docs/js/benchmark-bundle.min.js",
+    "deploy:peggy": "copyfiles build/peggy.min.js docs/vendor/peggy/ && copyfiles build/peggy.min.js browser/",
+    "deploy:tests": "copyfiles build/test-bundle.min.js docs/js/",
+    "deploy:bench": "copyfiles build/benchmark-bundle.min.js docs/js/",
     "build": "npm run build:notidy && npm run tidy",
     "build:notidy": "npm run setup && npm run make && npm run headers && npm run lint && npm run deploy && npm run audit",
     "setup": "npm run clean && npm run set_version",
@@ -60,6 +60,7 @@
     "browser-sync": "^2.27.5",
     "chai": "^4.3.4",
     "commander": "^8.2.0",
+    "copyfiles": "^2.4.1",
     "eslint": "^8.0.1",
     "express": "4.17.1",
     "jest": "^27.3.0",