Remove callback in instance tests
Move options test into separate folder
Tests fixes
Rename test/options to test/core
Tests change the wording a little bit
Improve path and url tests
Move oauth options call into core
Improve get options tests
Add post options tests
Improve upload tests
Simplify RFC3986 escaping
Improve utils response tests
Extract OAuth request signing method
Fix openstreetmap get test
Specify dev depencies version
Move credentials to test/utils
Add refresh token tests and helper module
Rename all occurances of api to endpoint
Implement refresh tokens in get tests
Fix gmaps tests