ACT Release v1.4.0

What's Changed

• ADD: Add an example plotting text on a skewt by @mgrover1 in #608
• ENH: NEON example update by @AdamTheisen in #610
• Cb friendly by @AdamTheisen in #613
• CI: Switching to codecov by @zssherman in #615
• FIX: Fix link to new codecov in readme by @mgrover1 in #617
• ARM AAF Flight Track - GeographicPlotDisplay Example by @jrobrien91 in #616
• Updated read_netcdf() function to be more ARM specific by @kenkehoe in #620
• ADD: Groupby plotting capability. by @rcjackson in #621
• ADD: New function for calculating PBL using the Heffter method by @AdamTheisen in #622
• FIX: Groupby plots will now group timeseries subplots by by @rcjackson in #624

Full Changelog: v1.3.5...v1.4.0