tex-circuitikz{,-doc}: update to 1.3.0

The main changes here are under the hood: a big refactoring that should
have helped fixed some long-standing misfeatures.
In case of disaster, there is a new rollback point added (still not
using the new LaTeX rollback mechanism, though).

- Fixed a long-standing problem with labels and similar decoration
  with equal signs and commas
- Fixed a typo in the manual (thanks to @muzimuzhi on GitHub)
- The Mother of All Code Refactoring: no real changes (modulo errors)
- Added a rollback point to 1.2.7

(markd)