fix: clean shouldn't error if a .tgz doesn't exist

- `rm *.tgz` when it doesn't exist errors, so add a `-f` to fix that

- also this is just deleting the results of `npm pack` for anyone not
  sure what `*.tgz` is referencing

Author: agilgur5

package.json

@@ -38,7 +38,7 @@
     "template"
   ],
   "scripts": {
-    "clean": "rm -rf dist/ && rm *.tgz",
+    "clean": "rm -rf dist/ && rm -f *.tgz",
     "clean:build": "npm run clean && npm run build",
     "build": "concurrently -n rollup,tsc \"npm run build:rollup\" \"npm run build:types\"",
     "build:rollup": "rollup -c rollup.config.ts --configPlugin rollup-plugin-typescript2",