Markdown is amazing and such an awesome way to format the text you write. I am using most of the features from it where appropriate.
You can use relative paths in markdown links.
Don't add extra space after heading as it is unnecessary.
In referencing titles to jump to in readme, lowercase them. i.e. Contributing. Lose the punctuation in the end in the link.
micromark - New, tiny, and fast, markdown parser written in TypeScript.