Merge pull request #889 from JuliaRobotics/22Q3/ci/jl1.8

Update CI to test julia v1.8

Author: Affie

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
       matrix:
         version:
           - '1.6'
-          - '1.7'
+          - '1.8'
           - 'nightly'
         os:
           - ubuntu-latest
@@ -82,7 +82,7 @@ jobs:
       matrix:
         version:
           - '1.6'
-          - '1.7'
+          - '1.8'
         os:
           - ubuntu-latest
         arch:
@@ -161,7 +161,7 @@ jobs:
       - name: Setup julia
         uses: julia-actions/setup-julia@v1
         with:
-          version: 1.7
+          version: 1.8
           arch: x64
 
       - name: Build Docs