Modify package description in Cargo.toml

Updated the package description to include C++ wrapper details.

Author: nyurik

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "fastpfor"
 version = "0.6.3"
-description = "FastPFOR library written in Rust."
+description = "FastPFOR lib with C++ Rust wrapper and pure Rust implementation"
 authors = [
     "Francisco Jimenez <[email protected]>",
     "Yuri Astrakhan <[email protected]>",