CI: Run ci on stable julia (#69)

* CI: Run ci on julia 1/1.6

* Update .github/workflows/CI.yml

Author: inkydragon

.github/workflows/CI.yml

@@ -14,7 +14,7 @@ jobs:
       matrix:
         version:
           - '1.3'
-          - '1.4'
+          - '1'
 #          - 'nightly'
         os:
           - ubuntu-latest