Add Elixir 1.13 to CI (#641)

* Add Elixir 1.13 to CI

Fixes #638

* Only set warnings_as_errors for 1.12

Author: axelson

.github/workflows/ci.yml

@@ -31,7 +31,13 @@ jobs:
           - elixir: 1.12.x
             otp: 24.0.x
             tests_may_fail: false
+            check_unused_deps: true
             warnings_as_errors: true
+          - elixir: 1.13.x
+            otp: 24.0.x
+            tests_may_fail: false
+            # Needs to be false until https://github.com/elixir-lsp/elixir-ls/issues/642 is fixed
+            warnings_as_errors: false
             check_formatted: true
             check_unused_deps: true
             run_dialyzer: true

.github/workflows/release-asset.yml

@@ -32,8 +32,10 @@ jobs:
     strategy:
       matrix:
         include:
+          - elixir-version: '1.13'
+            otp-version: '24.1'
           - elixir-version: '1.12'
-            otp-version: '24.0'
+            otp-version: '24.1'
           - elixir-version: '1.11'
             otp-version: '23.3'
           - elixir-version: '1.10'