Update git submodules
Update git submodules

* Update plugins/codemirror-editor from branch 'master'
  to 59942b1adf1c949f3633f60ac42f67fae03b3255
  - Merge "Add support for fsharp"
  - Add support for fsharp
    
    fsharp: [1]
    
    [1] https://github.com/codemirror/CodeMirror/blob/master/mode/mllike/mllike.js
    
    Change-Id: I5e7628494c7290110346036a9ea12535e012b6e1
    
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