Merge pull request #227 from stobrien89/update-ubuntu

Update ubuntu image

Author: stobrien89

.github/workflows/tests.yml

@@ -9,7 +9,7 @@ on:
 
 jobs:
   run:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         include: