fix: clean script to include TypeScript output directory

Author: harmony7

package.json

@@ -32,7 +32,7 @@
     "test:wpt": "tests/wpt-harness/build-wpt-runtime.sh && node ./tests/wpt-harness/run-wpt.mjs -vv",
     "test:wpt:debug": "tests/wpt-harness/build-wpt-runtime.sh --debug-build && node ./tests/wpt-harness/run-wpt.mjs -vv",
     "test:types": "tsd",
-    "clean": "rm -f starling.wasm fastly.wasm fastly.debug.wasm fastly-weval.wasm fastly-ics.wevalcache fastly-js-compute-*.tgz",
+    "clean": "rm -f dist/ starling.wasm fastly.wasm fastly.debug.wasm fastly-weval.wasm fastly-ics.wevalcache fastly-js-compute-*.tgz",
     "build": "npm run clean && npm run build:cli && npm run build:debug && npm run build:release && npm run build:weval",
     "build:cli": "tsc",
     "build:release": "./runtime/fastly/build-release.sh",