Use IgnoreNodeManager for filtering Code node

[azu]

Hi @nodaguti , I've updated dependecies and improved Code filtering logic.

• Use IgnoreNodeManger for filtering Code node.
• Update dependencies

  Before

This is unexpected error.

$ echo "\`var a = i;\` is code" > output.md
$ textlint -f pretty-error --rule ginger output.md
✓ ginger: code -> Code
/Users/azu/.ghq/github.com/azu/teasa/output.md:1:1
       v
    0.
    1. `var a = i;` is code
    2.
       ^

✖ 1 problem (1 error, 0 warnings)
✓ 1 fixable problem.
Try to run: $ textlint --fix [file]

After

No error.

What do you think?

[nodaguti]

Great improvements! Thank you very much.