Add Elixir 1.18

Author: warmwaffles

.github/workflows/ci.yml

@@ -17,7 +17,7 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest"]
-        elixir: ["1.17"]
+        elixir: ["1.18"]
         otp: ["27"]
     steps:
       - uses: actions/checkout@v4
@@ -48,7 +48,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ["ubuntu-latest"]
-        elixir: ["1.17", "1.16", "1.15"]
+        elixir: ["1.18", "1.17", "1.16", "1.15"]
         otp: ["27", "26", "25"]
         exclude:
           - elixir: "1.15"