fix: delete folders before build steps

Author: kuhe

smithy-typescript-codegen/src/main/resources/software/amazon/smithy/typescript/codegen/base-package.json

@@ -4,9 +4,9 @@
   "version": "${packageVersion}",
   "scripts": {
     "build": "concurrently '${packageManager}:build:cjs' '${packageManager}:build:es' '${packageManager}:build:types'",
-    "build:cjs": "tsc -p tsconfig.cjs.json",
-    "build:es": "tsc -p tsconfig.es.json",
-    "build:types": "tsc -p tsconfig.types.json",
+    "build:cjs": "(rimraf ./dist-cjs || exit 0) && tsc -p tsconfig.cjs.json",
+    "build:es": "(rimraf ./dist-es || exit 0) tsc -p tsconfig.es.json",
+    "build:types": "(rimraf ./dist-types || exit 0) tsc -p tsconfig.types.json",
     "build:types:downlevel": "downlevel-dts dist-types dist-types/ts3.4",
     "clean": "rimraf ./dist-* && rimraf *.tsbuildinfo || exit 0",
     "prepack": "${packageManager} run clean && ${packageManager} run build"