Prepare v0.8.0 release

Author: kbattocchi

README.md

@@ -44,10 +44,12 @@ For information on use cases and background material on causal inference and het
 
 # News
 
-**September 4, 2020:** Release v0.8.0b1, see release notes [here](https://github.com/Microsoft/EconML/releases/tag/v0.8.0b1)
+**November 18, 2020:** Release v0.8.0, see release notes [here](https://github.com/Microsoft/EconML/releases/tag/v0.8.0)
 
 <details><summary>Previous releases</summary>
 
+**September 4, 2020:** Release v0.8.0b1, see release notes [here](https://github.com/Microsoft/EconML/releases/tag/v0.8.0b1)
+
 **March 6, 2020:** Release v0.7.0, see release notes [here](https://github.com/Microsoft/EconML/releases/tag/v0.7.0)
 
 **February 18, 2020:** Release v0.7.0b1, see release notes [here](https://github.com/Microsoft/EconML/releases/tag/v0.7.0b1)

setup.cfg

@@ -7,11 +7,11 @@ max-line-length=119
 convention=numpy
 
 [build_sphinx]
-version = 0.8.0b1
+version = 0.8.0
 
 [metadata]
 name = econml
-version = 0.8.0b1
+version = 0.8.0
 author = Microsoft Corporation
 description = This package contains several methods for calculating Conditional Average Treatment Effects
 long_description = file: README.md