Cf-xarray

What's Changed
* Avoid quadratic behaviour when dropping bounds by dcherian in https://github.com/xarray-contrib/cf-xarray/pull/349
* Print variable name for cell measures warnings by dcherian in https://github.com/xarray-contrib/cf-xarray/pull/350


**Full Changelog**: https://github.com/xarray-contrib/cf-xarray/compare/v0.7.3...v0.7.4

What's Changed
* Increased support for cf_role by dcherian in https://github.com/xarray-contrib/cf-xarray/pull/327
* correct docstring by rcaneill in https://github.com/xarray-contrib/cf-xarray/pull/329
* Dependabot by malmans2 in https://github.com/xarray-contrib/cf-xarray/pull/332
* Check attrs before printing guess by malmans2 in https://github.com/xarray-contrib/cf-xarray/pull/331
* ENH: Add "Celsius" alias by bzah in https://github.com/xarray-contrib/cf-xarray/pull/336
* Explicit support for curvefit by dcherian in https://github.com/xarray-contrib/cf-xarray/pull/337
* Infer 1D bounds for nD variables. by dcherian in https://github.com/xarray-contrib/cf-xarray/pull/328
* keep compatibility with the development version of `pint` by keewis in https://github.com/xarray-contrib/cf-xarray/pull/341
* Drop py37 by dcherian in https://github.com/xarray-contrib/cf-xarray/pull/296
* CI improvements by dcherian in https://github.com/xarray-contrib/cf-xarray/pull/342
* Explicit xarray imports by aulemahal in https://github.com/xarray-contrib/cf-xarray/pull/343

New Contributors
* dependabot made their first contribution in https://github.com/xarray-contrib/cf-xarray/pull/333
* bzah made their first contribution in https://github.com/xarray-contrib/cf-xarray/pull/336

**Full Changelog**: https://github.com/xarray-contrib/cf-xarray/compare/v0.7.2...v0.7.3