ci: test on the most recent Julia version (v1.10)

The package aims to be compatible with the most up-to-date version of
Julia and the current LTS. The CI infrastructure has not reflected this
for some time resulting in issues like #48 going by unnnoticed.

.github/workflows/CI.yml

@@ -15,7 +15,7 @@ jobs:
       matrix:
         version:
           - '1.6'
-          - '1.7'
+          - '1.10'
         os:
           - ubuntu-latest
           - macOS-latest