Splink-graph

splink_graph updated so it works on contemporary version of Spark (3.1.1) and graphframes (0.8.2 )

**Full Changelog**: https://github.com/moj-analytical-services/splink_graph/compare/v0.5.0...v0.8.2

What's Changed
* Create DOCUMENTATION.md by EKenning in https://github.com/moj-analytical-services/splink_graph/pull/81
* add num of articulation pts cluster metric by mamonu in https://github.com/moj-analytical-services/splink_graph/pull/79
* Create splink_graph_guide.md by EKenning in https://github.com/moj-analytical-services/splink_graph/pull/82
* Update splink_graph_guide.md by EKenning in https://github.com/moj-analytical-services/splink_graph/pull/84
* Mamonu docs patch 1 by mamonu in https://github.com/moj-analytical-services/splink_graph/pull/83
* Mamonu doc patch 2 by mamonu in https://github.com/moj-analytical-services/splink_graph/pull/85
* add graph_hashes with edge attributes by mamonu in https://github.com/moj-analytical-services/splink_graph/pull/86

New Contributors
* EKenning made their first contribution in https://github.com/moj-analytical-services/splink_graph/pull/81

**Full Changelog**: https://github.com/moj-analytical-services/splink_graph/compare/v0.4.21...v0.5

What's Changed
* Update TERMINOLOGY.md by pratibha-vellanki in https://github.com/moj-analytical-services/splink_graph/pull/66
* Assortativity cluster metric added by mamonu in https://github.com/moj-analytical-services/splink_graph/pull/67
* Fix problem with num_bridges issue 71 by RobinL in https://github.com/moj-analytical-services/splink_graph/pull/74
* remove rounding and simplify expressions by RobinL in https://github.com/moj-analytical-services/splink_graph/pull/75
* Degeneracy cluster metric added by mamonu in https://github.com/moj-analytical-services/splink_graph/pull/78

New Contributors
* pratibha-vellanki made their first contribution in https://github.com/moj-analytical-services/splink_graph/pull/66

**Full Changelog**: https://github.com/moj-analytical-services/splink_graph/compare/v0.4.19...v0.4.21

main additions from previous release:

- support for python 3.6 added and tested
- graph hash function has its own pandas_udf

- small fixes

**added connected components functionality**

- [x] graphframes (working in a distributed manner) version / needs jars (included) / util functions help setting up
- [x] networkx (working on local master node) version since not every case needs scale
- [x] nx based cc also saves optionaly each subcluster in networkx edgelist format (this is useful for embeddings ... tested and it works)

**added number of bridges cluster metric**

- [x] number of bridges cluster metric is added. Useful for finding problematic clusters/subgraphs