Include typescript files with npm package for source maps (#82)

* include TS in dist

* include typescript source with npm package for source maps

Author: aarsilv

package.json

@@ -1,10 +1,12 @@
 {
   "name": "@eppo/js-client-sdk-common",
-  "version": "3.2.1",
+  "version": "3.2.2",
   "description": "Eppo SDK for client-side JavaScript applications (base for both web and react native)",
   "main": "dist/index.js",
   "files": [
-    "/dist"
+    "/dist",
+    "/src",
+    "!*.spec.ts"
   ],
   "types": "./dist/index.d.ts",
   "engines": {