Update README.md

Update ReleaseNotes.txt

v 2.0.0 GA

v2.0.0GA

maxkey_login_licenses

test service

domain

v2.0.0 RC1

removed

v1.3 RC

v1.2.1 GA

SAML 2.0 optimization,support 阿里云、腾讯云 SSO
maxkey-mgt main report
APPS ExtraAttr
fix ui bugs
remove maxkey-jose-jwt
dep com.nimbusds nimbus-jose-jwt
dep net.jcip jcip-annotations
dep net.minidev json-smart
dep net.minidev asm