Test CI with JSON@1

Author: odow

.github/workflows/ci.yml

@@ -41,6 +41,8 @@ jobs:
           - version: '1.6'
             os: ubuntu-latest
             arch: x64
+          # We may need to make some changes because of
+          # https://github.com/JuliaIO/JSON.jl/issues/386
           - version: '1'
             os: ubuntu-latest
             arch: x86