Bump README version to 2.0.0

Signed-off-by: John Pennycook <john.pennycook@intel.com>

Author: Pennycook

README.md

@@ -45,11 +45,11 @@ portability and maintainability of an application's source code.
 
 ## Installation
 
-The latest release of CBI is version 1.2.0. To download and install this
+The latest release of CBI is version 2.0.0. To download and install this
 release, run the following:
 
 ```
-git clone --branch 1.2.0 https://github.com/intel/code-base-investigator.git
+git clone --branch 2.0.0 https://github.com/intel/code-base-investigator.git
 cd code-base-investigator
 pip install .
 ```