Codemirror 5 July 8, 2019 16 32 64 128 Codemirror 5 to 6 Codemirror 5 change event Codemirror 5 vs 6 Codemirror 5 themes Codemirror 5 documentation Codemirror 5 to 6 migration Codemirror 5 readonly Codemirror 5 cdn Codemirror 5 autocomplete Codemirror 5 npm Codemirror 5 github Codemirror 5 demo Codemirror 5 lint Codemirror 5 download