Release v0.6.6

What's Changed

• Added updated Whitepaper by @thomivy in #583
• fix: Remove all unsafe math by @1xstj in #584
• Update scripts/run-standalone-local.sh for easier testing by @shekohex in #586
• Fixes signature verification after upgrading DFNS by @drewstone in #570
• update validators and release v0.6.6 by @1xstj in #587
• Submit DKGPhase2Result through script by @salman01zp in #588
• Update readme on running local tests by @salman01zp in #589
• [fix] add entire amount in claims by @1xstj in #590
• runtime audit : fixes by @1xstj in #592

Full Changelog: v0.6.5...v0.6.6