chore: prepare v6.6.1 for release

Author: Justintime50

CHANGELOG.md

@@ -1,6 +1,6 @@
 # CHANGELOG
 
-## Next Release
+## v6.6.1 (2023-05-09)
 
 - Test suite tweaked so EasyVCR is no longer a production dependency
 

README.md

@@ -16,7 +16,7 @@ Add this to your project's POM:
 <dependency>
   <groupId>com.easypost</groupId>
   <artifactId>easypost-api-client</artifactId>
-  <version>6.6.0</version>
+  <version>6.6.1</version>
 </dependency>
 ```
 
@@ -25,7 +25,7 @@ Add this to your project's POM:
 Add this to your project's build file:
 
 ```groovy
-implementation "com.easypost:easypost-api-client:6.6.0"
+implementation "com.easypost:easypost-api-client:6.6.1"
 ```
 
 **NOTE:** [Google Gson](http://code.google.com/p/google-gson/) is required.

VERSION

@@ -1 +1 @@
-6.6.0
+6.6.1

pom.xml

@@ -6,7 +6,7 @@
     <groupId>com.easypost</groupId>
     <artifactId>easypost-api-client</artifactId>
 
-    <version>6.6.0</version>
+    <version>6.6.1</version>
     <packaging>jar</packaging>
 
     <name>com.easypost:easypost-api-client</name>