Update ci versions (#96)

* Also test integration on 1.9 prerelease version

* Also run main tests on Julia 1.9 prerelease

Author: brenhinkeller

.github/workflows/ci-integration-nightly.yml

@@ -19,6 +19,7 @@ jobs:
       matrix:
         version:
           - 'nightly'
+          - '~1.9.0-0'
         os:
           - ubuntu-latest
           - macOS-latest

.github/workflows/ci-julia-nightly.yml

@@ -19,6 +19,7 @@ jobs:
       matrix:
         version:
           - 'nightly'
+          - '~1.9.0-0'
         os:
           - ubuntu-latest
           - macOS-latest