Summary of changes

• Expose git_remote_rename
• Bump OpenSSL from 1.1.0i -> 1.1.1c in Windows/Mac OS Electron builds
• Replace unmaintained request library with got
• Remove promisify-node and use vanilla promises for all NodeGit promises

#Merged PRs into NodeGit

• Remove promisify-node and remove old callback api remnants
• Replace deprecated package request with got
• Bump OpenSSL prebuilt to 1.1.1c
• Expose git_remote_rename
• Dedupe Remote.prototype.fetch