Fix scripts for npm by extracting run command out

Author: gosar

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/TypeScriptSettings.java

@@ -395,7 +395,7 @@ public SymbolProvider createSymbolProvider(Model model, TypeScriptSettings setti
 
     public enum PackageManager {
         YARN("yarn"),
-        NPM("npm run-script");
+        NPM("npm");
 
         private final String command;
 

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

@@ -10,7 +10,7 @@
     "build:types": "tsc -p tsconfig.types.json",
     "build:types:downlevel": "downlevel-dts dist-types dist-types/ts3.4",
     "clean": "rimraf ./dist-* && rimraf *.tsbuildinfo",
-    "prepack": "${packageManager} clean && ${packageManager} build"
+    "prepack": "${packageManager} run clean && ${packageManager} run build"
   },
   "main": "./dist-cjs/index.js",
   "types": "./dist-types/index.d.ts",