1.0.0 readiness

Updates the CHANGELOG.md to set the release date.

Author: laminas-bot

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 All notable changes to this project will be documented in this file, in reverse chronological order by release.
 
-## 1.0.0 - TBD
+## 1.0.0 - 2020-09-02
 
 ### Added
 
@@ -28,3 +28,27 @@ All notable changes to this project will be documented in this file, in reverse
 ### Fixed
 
 - Nothing.
+
+
+-----
+
+### Release Notes for [1.0.0](https://github.com/mezzio/mezzio-cors/milestone/1)
+
+
+
+### 1.0.0
+
+- Total issues resolved: **0**
+- Total pull requests resolved: **5**
+- Total contributors: **1**
+
+#### Enhancement
+
+ - [5: Add support for PHP 8.0](https://github.com/mezzio/mezzio-cors/pull/5) thanks to @boesing
+ - [4: Psalm](https://github.com/mezzio/mezzio-cors/pull/4) thanks to @boesing
+ - [1: Upgrade phpstan to 0.12](https://github.com/mezzio/mezzio-cors/pull/1) thanks to @boesing
+
+#### Bug,Documentation
+
+ - [3: Use proper branches for badges](https://github.com/mezzio/mezzio-cors/pull/3) thanks to @boesing
+ - [2: Documentation fixes](https://github.com/mezzio/mezzio-cors/pull/2) thanks to @boesing