Add GitHub actions workflow for running tests (#1)

* Add GitHub actions workflow for running tests

* Fix file syntax

* Use jsontypedef/json-typedef-spec as remote for submodule

* Use https for remote url

Author: ucarion

Diff for: .github/workflows/ci.yml

@@ -0,0 +1,16 @@
+on: push
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Checkout submodules
+        shell: bash
+        run: |
+          auth_header="$(git config --local --get http.https://github.com/.extraheader)"
+          git submodule sync --recursive
+          git -c "http.extraheader=$auth_header" -c protocol.version=2 submodule update --init --force --recursive --depth=1
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+      - run: cargo test

Diff for: .gitmodules

@@ -1,3 +1,3 @@
 [submodule "json-typedef-spec"]
 	path = json-typedef-spec
-	url = git@github.com:ucarion/json-typedef-spec.git
+	url = https://github.com/jsontypedef/json-typedef-spec.git