Support typechange status

[ObserverOfTime]

typechange: file type changed (regular file, symbolic link or submodule)

Example

#	typechange: after/ftplugin/svelte.vim

Parse tree

Current

  (generated_comment ; [13, 0] - [13, 39]
    (filepath) ; [13, 2] - [13, 13]
    (annotation)) ; [13, 14] - [13, 39]

Expected

  (generated_comment ; [13, 0] - [13, 39]
    (change ; [13, 2] - [13, 13]
      kind: (typechange)) ; [13, 2] - [13, 13]
    (filepath)) ; [13, 14] - [13, 39]

[gbprod]

Interesting !
I'll will try to do someting :)

[gbprod]

Fixed by #72 :)