Initial Tests & CI (#5)

* Added awscrt_version() and test for it

* Added builder.json for CI

* Added github actions

* Added format-check.sh

* Force php5.6 on ubuntu

* Updated submodules

.github/workflows/clang-format.yml

@@ -0,0 +1,18 @@
+name: Lint
+
+on: [push]
+
+jobs:
+  clang-format:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout Sources
+      uses: actions/checkout@v1
+      
+    - name: clang-format lint
+      uses: DoozyX/[email protected]
+      with:
+        # List of extensions to check
+        extensions: c,h