Update CI

Author: undr

.github/workflows/elixir.yml

@@ -11,14 +11,17 @@ jobs:
 
     name: Build and test
     runs-on: ubuntu-latest
-
+    strategy:
+      matrix:
+        otp: ['25.0.4']       # Define the OTP version [required]
+        elixir: ['1.14.1']    # Define the elixir version [required]
     steps:
     - uses: actions/checkout@v2
     - name: Set up Elixir
       uses: erlef/setup-beam@v1
       with:
-        elixir-version: '1.12.3' # Define the elixir version [required]
-        otp-version: '24.1' # Define the OTP version [required]
+        otp-version: ${{matrix.otp}}
+        elixir-version: ${{matrix.elixir}}
     - name: Restore dependencies cache
       uses: actions/cache@v2
       with: