Use Github Actions instead of Travis CI

Also change Dependabot frequency to monthly, and add updates for
Github Actions.

Also include Dialyxir in the "test" Mix environment, not just "dev".

Author: legoscia

.github/dependabot.yml

@@ -3,6 +3,12 @@ updates:
 - package-ecosystem: mix
   directory: "/"
   schedule:
-    interval: daily
-    time: "04:00"
-  open-pull-requests-limit: 10
+    interval: monthly
+- package-ecosystem: "github-actions"
+  directory: "/"
+  schedule:
+    interval: monthly
+  groups:
+    gh-actions:
+      patterns:
+      - "*"

.github/workflows/ci.yml

@@ -0,0 +1,47 @@
+name: Test
+
+on: push
+
+env:
+    MIX_ENV: test
+    OTP_VER: '26.1'
+    ELIXIR_VER: '1.16.1'
+
+jobs:
+    build:
+        runs-on: ubuntu-latest
+        steps:
+          - uses: actions/checkout@v5
+          - name: Setup Erlang/Elixir
+            uses: erlef/setup-beam@v1
+            with:
+              otp-version: ${{ env.OTP_VER }}
+              elixir-version: ${{ env.ELIXIR_VER }}
+              version-type: strict
+
+          - name: Cache plt
+            uses: actions/cache@v4
+            with:
+              path: |
+                ~/.mix
+                _build/dev
+                _build/test
+                !_build/dev/lib
+                !_build/test/lib
+              key: plt_erlang-${{ env.OTP_VER }}_elixir-${{ env.ELIXIR_VER }}
+              restore-keys: plt_erlang-${{ env.OTP_VER }}_elixir-${{ env.ELIXIR_VER }}
+
+          - name: Get dependencies
+            run: mix deps.get
+
+          - name: Compile
+            run: mix compile
+
+          - name: Test
+            run: mix test
+
+          - name: Credo
+            run: mix credo
+
+          - name: Run dialyzer
+            run: mix dialyzer

.travis.yml

@@ -23,7 +23,7 @@ defmodule TelemetryMetricsStatman.MixProject do
     [
       {:telemetry_metrics, "~> 0.6.2 or ~> 1.0"},
       {:statman, github: "GameAnalytics/statman", tag: "v0.13"},
-      {:dialyxir, "~> 1.0", only: [:dev], runtime: false},
+      {:dialyxir, "~> 1.0", only: [:dev, :test], runtime: false},
       {:credo, "~> 1.4", only: [:dev, :test], runtime: false},
       {:mock, "~> 0.3", only: :test},
     ]