Function lockInit

lockInit(filePath: string): Promise<LockInitResponse>
This method exists as a separate function so it can be used by ConfigFile OR outside of ConfigFile.
Parameters
- filePath: string
  where to save the file
Returns Promise<LockInitResponse>
2 functions:
- writeAndUnlock: a function that takes the data to write and writes it to the file, then unlocks the file whether write succeeded or not
- unlock: a function that unlocks the file (in case you don't end up calling writeAndUnlock)
- Defined in src/util/fileLocking.ts:40