Version 3.0

What's Changed

• bump cartopy to v 0.21.0 to try and resolve issues with naturalearth by @wrongkindofdoctor in #420
• add networkx and jupyterlab to python3_base.yml by @wrongkindofdoctor in #424
• update var attributes in pre_decode by @wrongkindofdoctor in #425
• update python version from 3.8 to 3.10 by @wrongkindofdoctor in #423
• add updated pdf docs to _static directory by @wrongkindofdoctor in #426
• Add CodeQL workflow for GitHub code scanning by @lgtm-com in #427
• clean up docs and add multirun info by @wrongkindofdoctor in #431
• fix logic core.parse_pod_list so that example string is matched exact… by @wrongkindofdoctor in #432

Full Changelog: v3.0.beta.6...v3.0