- Upgrade d3 to version 4
- Use external d3-textwrap library
    - rewrite src/d3.js
    - Problem is it's for d3 v4 only
- Make node console output colors like Chrome console
- What's the correct way to change logLevel as an end user?
    - mermaid.initialize({ logLevel: 1 })
- Replace CodeClimate with coveralls
- Get familar with jison
- git graph requires a blank line at the end. why?
- Move cli to mermaid-cli project ?
- Remove 'fs' as dependency
- Remove 'lodash' as dependency
    - https://github.com/lodash/babel-plugin-lodash
    - https://www.npmjs.com/package/lodash-webpack-plugin
- Replace var with const/let
- Replace karma-webpack with karma-babel
- Stops working for mermaid-live-editor since 7.0.9
- global.mermaid_config
- rewrite logger
- rewrite less code
- Don't generate temp_* folders in test/ folder
    - Generate them into system temp folder instead
- Replace phantomjs with Chrome headless
- `yarn jest` is disabled