Update workflows (#4)

* Update exec workflow
* added release workflow

.github/workflows/exec.yml

@@ -1,20 +1,12 @@
 name: Test extension
-on: push
+on: pull_request
 jobs:
   build:
     name: Exec
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
-    - name: Install npm
-      uses: actions/npm@master
-      with:
-        args: install
-    - name: Install zem
-      uses: actions/npm@master
-      with:
-        args: install -g zem
-    - name: Exec
-      uses: actions/npm@master
-      with:
-        args: run exec
+      - uses: actions/checkout@master
+      - name: test
+        uses: actions/setup-node@master
+      - run: npm install
+      - run: npm run exec

.github/workflows/release.yml

@@ -0,0 +1,16 @@
+name: Release
+on: release
+jobs:
+  build:
+    name: Release
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@master
+    - run: npm install
+    - run: npm run exec
+    - name: Publish
+      uses: artemnovichkov/action-zem@master
+      env:
+        ZEM_TOKEN: ${{ secrets.ZEM_TOKEN }}
+      with:
+        args: publish