Initial release

float and double support (#26)

* float and double support

* Changing Travis go version to 1.13

* Removing dead code

* - Added comment that explains why we need to go get gnostic explicitly
- Update go.mod to use a tagged version of gnostic

* Adding better error handling in test files and refactoring duplicated code

* Adding properties to test different types

Co-authored-by: LorenzHW <lorenzhofmann.w@gmail.com>