ci: Update to use ubuntu-latest (#29)

Author: backspace

.github/workflows/ci.yml

@@ -2,7 +2,7 @@ on: push
 
 jobs:
   mix-test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     services:
       db:
         image: postgres:latest
@@ -21,7 +21,7 @@ jobs:
         uses: erlef/setup-beam@v1
         with:
           elixir-version: "1.14.0"
-          otp-version: "23.3.4.16"
+          otp-version: "25.3.2.20"
       - name: Install dependencies
         if: steps.mix-cache.outputs.cache-hit != 'true'
         run: |

.tool-versions

@@ -1,2 +1,2 @@
 elixir 1.14
-erlang 23.3.4.16
+erlang 25.3.2.20

elixir_buildpack.config

@@ -1,3 +1,3 @@
 config_vars_to_export=(DATABASE_URL GAS_PRICE_ENDPOINT MAILGUN_KEY)
-erlang_version=23.3.2
+erlang_version=25.3.2.20
 elixir_version=1.14.2