update versions in readme

Author: frantuma

README.md

@@ -29,11 +29,13 @@ See the guide on [getting started with swagger](https://github.com/swagger-api/s
 For 2.X see [getting started with swagger 2.X](https://github.com/frantuma/swagger-core/wiki/Swagger-2.X---Getting-started).
 
 ## Compatibility
-The OpenAPI Specification has undergone 3 revisions since initial creation in 2010.  The swagger-core project has the following compatibilities with the OpenAPI Specification:
+The OpenAPI Specification has undergone several revisions since initial creation in 2010.  The swagger-core project has the following compatibilities with the OpenAPI Specification:
 
 Swagger core Version      | Release Date | OpenAPI Spec compatibility | Notes | Status
 ------------------------- | ------------ | -------------------------- | ----- | ----
-2.0.3 (**current stable**)| 2018-08-09   | 3.0           | [tag v2.0.3](https://github.com/swagger-api/swagger-core/tree/v2.0.3) | Supported
+2.0.5 (**current stable**)| 2018-09-19   | 3.0           | [tag v2.0.5](https://github.com/swagger-api/swagger-core/tree/v2.0.5) | Supported
+2.0.4                     | 2018-09-05   | 3.0           | [tag v2.0.4](https://github.com/swagger-api/swagger-core/tree/v2.0.4) | Supported
+2.0.3                     | 2018-08-09   | 3.0           | [tag v2.0.3](https://github.com/swagger-api/swagger-core/tree/v2.0.3) | Supported
 1.5.21 (**current stable**)| 2018-08-09  | 2.0           | [tag v1.5.21](https://github.com/swagger-api/swagger-core/tree/v1.5.21) | Supported
 1.5.20                    | 2018-05-23  | 2.0           | [tag v1.5.20](https://github.com/swagger-api/swagger-core/tree/v1.5.20) | Supported
 2.0.2                     | 2018-05-23   | 3.0           | [tag v2.0.2](https://github.com/swagger-api/swagger-core/tree/v2.0.2) | Supported
@@ -97,7 +99,7 @@ The samples have moved to [a new repository](https://github.com/swagger-api/swag
 ## License
 
 ```
-Copyright 2016 SmartBear Software
+Copyright 2018 SmartBear Software
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.