bump the version number for crates.io

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "nova-snark"
-version = "0.1.0"
+version = "0.2.0"
 authors = ["Srinath Setty <srinath@microsoft.com>"]
 edition = "2018"
 description = "Recursive zkSNARKs without trusted setup"

README.md

@@ -15,7 +15,8 @@ Abhiram Kothapalli, Srinath Setty, and Ioanna Tzialla \
 Cryptology ePrint Archive: Report 2021/370
 
 ## Acknowledgements
-v0.1.0 includes code written by: Abhiram Kothapalli, Srinath Setty, Ioanna Tzialla, and Friedel Ziegelmayer.
+The first version of the code was written by: Abhiram Kothapalli, Srinath Setty, and Ioanna Tzialla.
+The latest code includes code contributions from Chhi'mèd Künzang and Friedel Ziegelmayer.
 
 ## Contributing