add npm publish github action

.github/workflows/npm-publish.yml

@@ -0,0 +1,25 @@
+name: npm-publish
+on:
+  push:
+    branches:
+      - master # Change this to your default branch
+jobs:
+  npm-publish:
+    name: npm-publish
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@master
+      - name: Set up Node.js
+        uses: actions/setup-node@master
+        with:
+          node-version: 12.4.0
+      - name: Publish if version has been updated
+        uses: pascalgn/npm-publish-action@51fdb4531e99aac1873764ef7271af448dc42ab4
+        with: # All of theses inputs are optional
+          tag_name: "v%s"
+          tag_message: "v%s"
+          commit_pattern: "^Release (\\S+)"
+        env: # More info about the environment variables in the README
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }} # Leave this as is, it's automatically generated
+          NPM_AUTH_TOKEN: ${{ secrets.NPM_AUTH_TOKEN }} # You need to set this in your repo settings

package.json

@@ -1,6 +1,6 @@
 {
   "name": "js-libp2p-noise",
-  "version": "1.0.0-beta",
+  "version": "1.0.0-rc",
   "main": "dist/index.js",
   "module": "lib/index.js",
   "files": [