1. Make variables to customizations.
2. Improve git-timemachine segment.
3. Fix #195: Invalid face reference in persp-name.
4. PR #197: When if-let* or when-let* was defined, don't do alias for it.
5. PR #190 Add icon for persp-name segment.
6. Add an icon to the persp-name segment.
7. Enhance debug segment.
8. Optimize: calculate font height of mode-line.
9. Fix: Wrong number of arguments in info-nodes segment.
10. Ignore unhandled errors in after-change-functions.
11. Fix #185: doom-modeline breaks query-replace.
12. Fix #180: Error for TRAMP python in doom-modeline-env.
13. Fix #180: Error for TRAMP python in doom-modeline-env.
14. Fix #178: "Error during redisplay" when org agenda mode is enabled.
15. Use window-configuration-change-hook instead of the advice
16. Misc improvements.