Delete *.tsbuildinfo in clean script (smithy-lang#514)

Author: trivikr

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

@@ -9,7 +9,7 @@
     "build:es": "tsc -p tsconfig.es.json",
     "build:types": "tsc -p tsconfig.types.json",
     "build:types:downlevel": "downlevel-dts dist-types dist-types/ts3.4",
-    "clean": "rimraf ./dist-*",
+    "clean": "rimraf ./dist-* && rimraf *.tsbuildinfo",
     "prepack": "${packageManager} clean && ${packageManager} build"
   },
   "main": "./dist-cjs/index.js",