chore: update go versions

all of the listed go versions prior to this change are no longer
supported. this bumps to more recent versions.

Author: gigamaax

.github/workflows/test.yml

@@ -24,9 +24,9 @@ jobs:
           - macos-13      # https://github.com/actions/runner-images/blob/main/images/macos/macos-13-Readme.md
           - windows-2022  # https://github.com/actions/runner-images/blob/main/images/win/Windows2022-Readme.md
         go-version:
-          - 1.18.x
-          - 1.19.x
-          - 1.20.x
+          - 1.22.x
+          - 1.23.x
+          - 1.24.x
         neovim-version:
           - v0.9.1
           - nightly