* Update homogenize-frontmatter script to not stop on errors and concurrency yes
* Update homogenize-frontmatter.js
* Speed up by avoiding exists check
Node docs: Using fs.exists() to check for the existence of a file before calling fs.open(), fs.readFile() or fs.writeFile() is not recommended. Doing so introduces a race condition, since other processes may change the file's state between the two calls. Instead, user code should open/read/write the file directly and handle the error raised if the file does not exist.
* Update homogenize-frontmatter.js
Co-authored-by: Zeke Sikelianos <zeke@github.com>