Test on OTP19-Ubuntu-20.04

Author: NelsonVides

.github/workflows/ci.yml

@@ -9,12 +9,19 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
+        os: ['ubuntu-24.04']
         otp: ['20', '21', '22', '23', '24', '25', '26', '27']
-    runs-on: ubuntu-24.04
+        include:
+          - otp: '19'
+            os: 'ubuntu-20.04'
+    runs-on: ${{matrix.os}}
     container:
       image: erlang:${{ matrix.otp }}
     steps:
+    - uses: actions/checkout@v1
+      if: matrix.otp == '19'
     - uses: actions/checkout@v4
+      if: matrix.otp != '19'
     - run: rebar3 compile
     - run: rebar3 xref
     - run: rebar3 dialyzer