v5.12.0

GitHub v5.12.0

Diff since v5.11.0

Merged pull requests:

• Respect GitHub rate-limit headers in responses (#233) (@ericphanson)
• Bump version from 5.11.0 to 5.12.0 (#254) (@DilumAluthge)

Closed issues:

• Respect GitHub's rate limit headers (#231)