utilize auto seleciton of latest patch version (#591)

Author: princemaple

.github/workflows/release-asset.yml

@@ -32,11 +32,11 @@ jobs:
     strategy:
       matrix:
         include:
-          - elixir-version: '1.12.1'
+          - elixir-version: '1.12'
             otp-version: '24.0'
-          - elixir-version: '1.11.4'
+          - elixir-version: '1.11'
             otp-version: '23.3'
-          - elixir-version: '1.10.4'
+          - elixir-version: '1.10'
             otp-version: '22.3'
             default: true