Methane lifetime non-NaN fix

Stops the term inside the methane lifetime scale factor going negative by setting a lower bound, settable in the call to FAIR() (name ch4_min, default 0.01).

What's Changed

• DOCS: small fixes in intro by @mathause in #186
• remove --recursive from isort by @chrisroadmap in #188
• Fix broken github actions by @chrisroadmap in #187
• DOCS: ignore warning by @mathause in #184
• DOCS: there is no _static folder by @mathause in #183
• fix PR link in CHANGELOG by @mathause in #182
• DOCS: add changelog by @mathause in #185
• implement lower bound for log methane lifetime factor by @chrisroadmap in #190
• update python version support in conda by @chrisroadmap in #191

New Contributors

• @mathause made their first contribution in #186

Full Changelog: v2.2.4...v2.2.5