ASA-150: initialize R github action

Author: bgrnwd

.github/workflows/python-tests.yml

@@ -3,7 +3,7 @@ name: Python tests
 on: [push]
 
 jobs:
-  build:
+  python:
     runs-on: ubuntu-latest
     strategy:
       matrix:

.github/workflows/r-tests.yml

@@ -0,0 +1,11 @@
+name: R tests
+on: [push]
+jobs:
+  r:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository code
+        uses: actions/checkout@v2
+      - name: Install R
+      - uses: r-lib/actions/setup-r@v1
+      # TODO install dependencies and run tests