Updates policy files from SBT [ci skip]

AUTHORS.md

@@ -10,6 +10,7 @@ The maintainers of the project are:
 
 These are the people that have contributed to the sbt-org-policies project:
 
+* Adrián Ramírez Fornell <[AdrianRaFo](https://github.com/AdrianRaFo)>
 * Ana Mª Marquez <[anamariamv](https://github.com/anamariamv)>
 * Andy Scott <[andyscott](https://github.com/andyscott)>
 * Ben Fradet <[BenFradet](https://github.com/BenFradet)>

README.md

@@ -1,7 +1,7 @@
 
 [comment]: # (Start Badges)
 
-[![Build Status](https://travis-ci.org/47deg/sbt-org-policies.svg?branch=master)](https://travis-ci.org/47deg/sbt-org-policies) [![Maven Central](https://img.shields.io/badge/maven%20central-0.5.7-green.svg)](https://repo1.maven.org/maven2/com/47deg/sbt-org-policies_2.10_0.13) [![License](https://img.shields.io/badge/license-Apache%202-blue.svg)](https://raw.githubusercontent.com/47deg/sbt-org-policies/master/LICENSE) [![GitHub Issues](https://img.shields.io/github/issues/47deg/sbt-org-policies.svg)](https://github.com/47deg/sbt-org-policies/issues)
+[![Build Status](https://travis-ci.org/47deg/sbt-org-policies.svg?branch=master)](https://travis-ci.org/47deg/sbt-org-policies) [![Maven Central](https://img.shields.io/badge/maven%20central-0.5.8-green.svg)](https://repo1.maven.org/maven2/com/47deg/sbt-org-policies_2.10_0.13) [![License](https://img.shields.io/badge/license-Apache%202-blue.svg)](https://raw.githubusercontent.com/47deg/sbt-org-policies/master/LICENSE) [![GitHub Issues](https://img.shields.io/github/issues/47deg/sbt-org-policies.svg)](https://github.com/47deg/sbt-org-policies/issues)
 
 [comment]: # (End Badges)
 # sbt-org-policies
@@ -14,7 +14,7 @@
 Add the following line to `project/plugins.sbt`:
 
 ```scala
-addSbtPlugin("com.47deg" % "sbt-org-policies" % "0.5.7")
+addSbtPlugin("com.47deg" % "sbt-org-policies" % "0.5.8")
 ```
 
 [comment]: # (End Replace)