Added extra tests to Ghost-CLI GitHub Action

no issue

- test for a clean install and updating from the latest release
- upgrading from the previous major is waiting on an update from
  Ghost-CLI

.github/workflows/ghost-cli.yml

@@ -6,7 +6,7 @@ on:
       - master
 
 jobs:
-  build:
+  clean-install:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
@@ -16,5 +16,29 @@ jobs:
       - run: npm install -g ghost-cli@latest
       - run: zip -r ghost.zip .
       - run: mkdir test
-      - run: ghost install local --zip ../ghost.zip
-        working-directory: test
+      - run: ghost install local -d test --zip ../ghost.zip
+  latest-release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v1
+        with:
+          node-version: '10'
+      - run: npm install -g ghost-cli@latest
+      - run: zip -r ghost.zip .
+      - run: mkdir test
+      - run: ghost install local -d test
+      - run: ghost update -d test --zip ../ghost.zip
+#  previous-major:
+#    runs-on: ubuntu-latest
+#    steps:
+#      - uses: actions/checkout@v2
+#      - run: git submodule update --init --force --recursive --depth=1
+#      - uses: actions/setup-node@v1
+#        with:
+#          node-version: '10'
+#      - run: npm install -g ghost-cli@latest
+#      - run: zip -r ghost.zip .
+#      - run: mkdir test
+#      - run: ghost install v2 --local -d test
+#      - run: ghost update -f -d test --zip ../ghost.zip