Run build before tests

package.json

@@ -6,6 +6,7 @@
 	"scripts": {
 		"build": "node ./esbuild.cjs",
 		"prepare": "rm -rf @types && npm run typecheck && npm run build-declarations && npm run build",
+		"pretest": "npm run build",
 		"test": "node test.cjs",
 		"build-declarations": "tsc --emitDeclarationOnly",
 		"typecheck": "tsc --noemit",