0.30.8

This is a backport of Sentinel-2c support to the 0.30 version of eodatasets. 0.30 is only intended for users who cannot yet upgrade to ODC 1.9.

• Add Sentinel-2C to abbreviations by @uchchwhash in #371

Full Changelog: eodatasets3-0.30.7...eodatasets3-0.30.8