What's Changed
- \usepgfplotslibrary used internal tikz macros by @hmenke in #354
 - Allow arbitrary expressions in limit of restrict to domain by @hmenke in #415
 - Fix compiling the manual by @hmenke in #393
 - Set up GitHub Actions by @hmenke in #392
 - add plasma colormap by @seeralans in #399
 - Skip non-finite values in Linear Regressions by @gucci-on-fleek in #412
 - Fix wrong page link destinations by @muzimuzhi in #364
 - Fix ConTeXt LMTX catcode problem by @hmenke in #353
 - delete a duplicate of \pgfplotsarraypushbackglobal by @muzimuzhi in #401
 - doc: remove superfluous word clip by @Mo-Gul in #417
 - New data file 
plotdata/approx_exp.datby @muzimuzhi in #416 - Fix wrong use of /.code handler by @hmenke in #426
 - fix: Remove stray grave accent by @muzimuzhi in #427
 trig format valueisrad(and notred) by @Mo-Gul in #422- Fix typos by @Mo-Gul in #421
 - fix: ifnum should be ifdim in \pgfplotsforeachtodomain by @feijoas in #451
 - docs: visualisation --> visualization by @Mo-Gul in #460
 - Improve plasma colormap by @Mo-Gul in #420
 - docs (tutorial1): adjust wording for option key formatting recommendations by @salewski in #472
 - Fix CI by @muzimuzhi in #506
 - Fix the phi(m) function. by @rdrehmel in #470
 - fix small typos by @mbertucci47 in #480
 - Update repo link in documentation by @mbertucci47 in #489
 - doc: libs.statistics: i runs till N, not N - 1 by @Flowdalic in #498
 - doc: libs.statistics: drop superfluous \Bigr by @Flowdalic in #499
 - document single bar legend styles by @praffeck in #490
 
New Contributors
- @seeralans made their first contribution in #399
 - @gucci-on-fleek made their first contribution in #412
 - @muzimuzhi made their first contribution in #364
 - @feijoas made their first contribution in #451
 - @salewski made their first contribution in #472
 - @rdrehmel made their first contribution in #470
 - @mbertucci47 made their first contribution in #480
 - @Flowdalic made their first contribution in #498
 - @praffeck made their first contribution in #490
 
Full Changelog: 1.18.1...1.18.2