minor updates to docs, prepare for push to pypi

Fixed issue in test, fixes #21

added key,update functions to Relationship/Node objects in rel2graph.…

…neo4j

Release 1.3.0

renamed type parameter of Relationship to relationship_type to avoid …

…naming conflicts with relationship properties

added neo4j push and pull functions

Merge branch 'main' of github.com:sg-dev/rel2graph into main

fixed bug with identities from neo4j being 0 and therefore not distin…

…guishable from None under simple if identity: clauses. Switched everything to if identity is None

Update README.md to v1.0.1

Update README.md