fix: add missing test script (#58)

Author: jacob-ebey

packages/fetch/package.json

@@ -48,6 +48,7 @@
     "build": "npm run build:cjs && npm run build:types",
     "test:es": "node --experimental-modules ../../node_modules/c8/bin/c8 --reporter=html --reporter=lcov --reporter=text --check-coverage node --experimental-modules ../../node_modules/mocha/bin/mocha",
     "test:cjs": "node ./test/commonjs/test-artifact.js",
+    "test": "npm run test:es && npm run test:cjs",
     "coverage": "c8 report --reporter=text-lcov | coveralls",
     "typecheck": "tsc",
     "build:types": "tsc --build",