Contains several small bug fixes from the Lexical 0.7.0 release.
- Fix paste for LexicalLinkPlugin (#3528) Dominic Gannaway
- RTL fix for checkbox (#3529) shiva-Aluri
- Add demos section to the navbar (#3507) akmarzhan1
- Fix lexical-offset (#3526) Dominic Gannaway
- Add missing Flow type for indentation plugin (#3527) John Flockton
- Docs: fix "node" type in "Node Overrides" example code (#3525) Chris Montrois
- Fix small Flow error (#3523) John Flockton