chore: use pnpm, get it building

Author: dummdidumm

package.json

@@ -9,10 +9,7 @@
   "scripts": {
     "build": "microbundle --define process.env.NODE_ENV=production --no-sourcemap --tsconfig ./tsconfig.json --format esm,cjs",
     "test": "jest --collect-coverage --silent",
-    "test:test262": "ts-node -T __test__/run_test262.ts",
-    "release-major": "yarn build && yarn test && standard-version --release-as major",
-    "release-minor": "yarn build && yarn test && standard-version --release-as minor",
-    "release-patch": "yarn build && yarn test && standard-version --release-as patch"
+    "test:test262": "ts-node -T __test__/run_test262.ts"
   },
   "exports": {
     ".": [
@@ -36,11 +33,10 @@
   "homepage": "https://github.com/sveltejs/acorn-typescript#readme",
   "devDependencies": {
     "@types/jest": "^24.1.0",
-    "acorn": "^8.9.0",
-    "acorn-jsx": "^5.3.2",
+    "acorn": "~8.9.0",
+    "acorn-jsx": "~5.3.2",
     "jest": "^24.1.0",
     "microbundle": "^0.15.1",
-    "standard-version": "^9.5.0",
     "ts-jest": "^26.0.0",
     "ts-node": "^10.9.1",
     "typescript": "^4.8.4",