updating composer file

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_tax/trunk@4871 950b781c-c544-efab-2f99-90083ee69683
UPGRADING 3.1

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_tax/trunk@4877 950b781c-c544-efab-2f99-90083ee69683
MOVING README files to README.md

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_tax/trunk@4909 950b781c-c544-efab-2f99-90083ee69683
MOVING README files to README.md

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_tax/trunk@4910 950b781c-c544-efab-2f99-90083ee69683
MOVING README files to README.md

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_tax/trunk@4911 950b781c-c544-efab-2f99-90083ee69683
MOVING README files to README.md

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_tax/trunk@4912 950b781c-c544-efab-2f99-90083ee69683
MOVING README files to README.md

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_tax/trunk@4913 950b781c-c544-efab-2f99-90083ee69683
ADDING .travis.yml file

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_tax/trunk@4914 950b781c-c544-efab-2f99-90083ee69683
TRAVIS FIX

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_tax/trunk@4915 950b781c-c544-efab-2f99-90083ee69683
UPDATING .travis.yml file

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_tax/trunk@4916 950b781c-c544-efab-2f99-90083ee69683
UPGRADE 3.1

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_tax/trunk@4928 950b781c-c544-efab-2f99-90083ee69683
replacing instances of self:: with ->Config()->get(my_variable)

git-svn-id: https://silverstripe-ecommerce.googlecode.com/svn/modules/ecommerce_tax/trunk@4937 950b781c-c544-efab-2f99-90083ee69683