v2.8.0

@jkuhl-uni

Several bug fixes and small feature additions.

This is the last minor release that supports python 3.7.

What's Changed

extended extract_t0 by postfix argument, default stays .ms by @jkuhl-uni in #168
Fix/gaps by @s-kuberski in #169
Feat/str format by @fjosw in #170
t0 extractions for new Hadrons module by @fjosw in #171
Fix/merge idx by @s-kuberski in #172
fix: String conversion of Obs can now handle a dvalue that is NaN or inf by @s-kuberski in #173
Fix/sort names by @jkuhl-uni in #177
Feat/flow by @s-kuberski in #176
Color and zorder for prange indicator in Corr.show added. by @fjosw in #178
Slightly better Typechecking when exporting to SQL by @jkuhl-uni in #174
Restored JSON output of dicts with non-string keys by @s-kuberski in #179
fix: dobs import added to input/init.py by @fjosw in #181

Full Changelog: v2.7.0...v2.8.0