download from node-versions and fallback to node dist (#147)

* download LTS versions from releases

* support upcoiming ghes 

Co-authored-by: eric sciple <ericsciple@users.noreply.github.com>

.github/workflows/versions.yml

@@ -0,0 +1,47 @@
+name: versions
+
+on:
+  pull_request:
+    paths-ignore:
+      - '**.md'    
+  push:    
+    branches:
+      - master
+      - releases/*
+    paths-ignore:
+      - '**.md'
+      
+jobs:
+  versions:
+    runs-on: ${{ matrix.operating-system }}
+    strategy:
+      fail-fast: false
+      matrix:
+        operating-system: [ubuntu-latest, windows-latest]
+    defaults:
+      run:
+        shell: bash
+    steps:
+      - uses: actions/checkout@v2
+      # test version that falls through to node dist
+      - name: Setup node 11 from dist
+        uses: ./
+        with:
+          node-version: 11          
+      - name: Verify node and npm
+        run: __tests__/verify-node.sh 11
+      # test old versions which didn't have npm and layout different      
+      - name: Setup node 0.12.18 from dist
+        uses: ./                 
+        with:
+          node-version: 0.12.18
+      - name: Verify node
+        shell: bash
+        run: __tests__/verify-node.sh 0.12.18 SKIP_NPM 
+      # test version from node manifest
+      - name: Setup node 12.16.2 from manifest
+        uses: ./
+        with:
+          node-version: 12.16.2
+      - name: Verify node and npm
+        run: __tests__/verify-node.sh 12