Cis

Minor numpy interface update.

**Full Changelog**: https://github.com/cedadev/cis/compare/1.7.7...1.7.8

Minor fix for latest bumpy version.

**Full Changelog**: https://github.com/cedadev/cis/compare/1.7.6...1.7.7

What's Changed
* Converting np.float to float by duncanwp in https://github.com/cedadev/cis/pull/41


**Full Changelog**: https://github.com/cedadev/cis/compare/1.7.5...1.7.6

* Fix ungridded collocation ignoring method options (37)
* Also update syntax to conform to new numpy standard fancy indexing
* Minor test fix for a change in Iris error Type

**Full Changelog**: https://github.com/cedadev/cis/compare/1.7.4a...1.7.5

* Updated for Python 3.9 support
* Support `Iris` 3.1 and `cfunits` 3.0 updates
* Circleci project setup by duncanwp in https://github.com/cedadev/cis/pull/36
* Added code coverage metrics to try and improve coverage
* Assorted bug fixes and tidying up by adamcpovey in https://github.com/cedadev/cis/pull/34


**Full Changelog**: https://github.com/cedadev/cis/compare/1.7.3...1.7.4a