Fix BigDecimal type error and regenerate from newer codegen

Full Changelog: v1.3...v1.4

• Fixes BigDecimal type errors
• Moves model to Model namespace
• Corrects URL in documentation
• Regenerated from newer codegen version which has implemented more request parameter validation and fixes to object serializer

Fix requests with lists of items due to swaggergen bug

Manual patch swagger generated code for handling lists of items

JSON lists of items handled incorrectly in requests by php 5.6 
compatible version of swaggergen, fixed in later versions.

Locked dev deps for package development

Add default host to configuration class

v1.2

Set default api host

Fix duplicate namespacing

v1.1

Fix duplicated namespacing

v1.0 Initial Release from swagger-gen

Fix package name for packagist