Update changelog for v2.1.0

Author: Paul Le Cam

CHANGELOG.md

@@ -1,16 +1,25 @@
+## v2.1.0 (2021-04-20)
+
+feat: Update DIDProvider and related types
+
 ## v2.0.1 (2021-05-08)
+
 chore: Update dependencies
 
 ## v2.0.0 (2021-03-10)
+
 feat: Upgrade to did-resolver v3
 
 ## v1.1.1 (2020-12-17)
+
 fix: proper detection of did-resolver class (#21)
 
 ## v1.1.0 (2020-11-26)
+
 feat: return payload in verifyJWS method
 
 ## v1.0.0 (2020-11-25)
+
 This release aligns this implementation with EIP2844.
 
 ## v0.6.1 (2020-09-22)