Proper release 2.1.0 (#40)

* Revert "Bump version to 2.1.0 (#38)"

This reverts commit b8b1bf1.

* Set proper versions in Cargo.toml

* Bump version to 2.1.0

Author: tomek0123456789

Cargo.toml

@@ -11,7 +11,7 @@ license = "MIT"
 
 
 [dependencies]
-cairo-lang-starknet-sierra-0_1_0 = { package = "cairo-lang-starknet", git = "https://github.com/starkware-libs/cairo.git", tag = "v1.0.0-alpha.6", version = "=1.0.0-alpha.6" }
+cairo-lang-starknet-sierra-0_1_0 = { package = "cairo-lang-starknet", git = "https://github.com/starkware-libs/cairo.git", tag = "v1.0.0-alpha.6", version = "1.0.0-alpha.6" }
 cairo-lang-starknet-sierra-1_0_0 = { package = "universal-sierra-compiler-cairo-lang-starknet-proxy", version = "=0.2.0" }
 cairo-lang-sierra-to-casm = "=2.6.0"
 cairo-lang-sierra = "=2.6.0"