Make package installable from git

Author: Vova Manannikov

.npmignore

@@ -1,7 +1,6 @@
 node_modules
 coverage
 examples
-src
 test
 tmp
 yarn.lock

package.json

@@ -5,9 +5,6 @@
   "main": "dist/index.cjs.js",
   "module": "dist/index.esm.js",
   "browser": "dist/index.js",
-  "files": [
-    "dist"
-  ],
   "repository": {
     "type": "git",
     "url": "git+https://github.com/OpenMined/syft.js.git"
@@ -34,7 +31,7 @@
   "scripts": {
     "start": "rollup -cw",
     "build": "rollup -c",
-    "prepublishOnly": "npm run build",
+    "prepare": "npm run build",
     "test": "jest --coverage",
     "test:watch": "jest --watch",
     "version": "auto-changelog -p && git add CHANGELOG.md",