Update cancel behavior

• Add taxrate rounding
• Improve behavior for canceled payments

Add new parameter

• Add consumerMerchantCrmId
• Improve security on payment server response
• Update orderstate to cancel after pending

Update of invoice b2b visibility conditions

4.0.9

Updated plugin version number

Added composer.json.

4.0.8

fixes composer.json

Update of plugin description

4.0.7

Update of plugin description.

Initial release on GitHub

4.0.6

Create LICENSE