Readme versions and update gitattributes (#81)

Author: fredsal

.gitattributes

@@ -6,5 +6,6 @@
 /docs               export-ignore
 /samples            export-ignore
 /tests              export-ignore
+/.gitattributes     export-ignore
 /.gitignore         export-ignore
 /.travis.yml        export-ignore

README.md

@@ -24,8 +24,8 @@ NuSOAP is a rewrite of SOAPx4, provided by NuSphere and Dietrich Ayala. It is a
 
 ## Info
 
-- Supported PHP: [5.4 - 8.0](https://travis-ci.org/pwnlabs/nusoap)
-- Latest version: [0.9.10](https://github.com/pwnlabs/nusoap/releases/tag/v0.9.10)
+- Supported PHP: [5.4 - 8.1](https://travis-ci.org/pwnlabs/nusoap)
+- Latest version: [0.9.11](https://github.com/pwnlabs/nusoap/releases/tag/v0.9.11)
 - Dev version: [develop](https://github.com/pwnlabs/nusoap/tree/develop)
 - Official project: https://sourceforge.net/projects/nusoap/