Pyvoc

Changelog
- add an option for specifying the no. of questions in the quiz. (8519e14)


**[Commits from v1.3.0 till v1.3.1](https://github.com/makkoncept/pyvoc/compare/v1.3.0...v1.3.1)**

Changelog
- Migrate pyvoc to work with Oxford API v2
- Refactor the argparse arguments (https://github.com/makkoncept/pyvoc/commit/dcf70672c8d3b4f26f147d319bede46f8949e553)
- Do not check for a duplicate entry in a group (https://github.com/makkoncept/pyvoc/commit/91f47c4b5f708a78cd0d6f8b424846b825b186f7)
- Redefine the implementation of user groups (https://github.com/makkoncept/pyvoc/commit/2277b1815bfd88a679aecd97dc0f43f3f3bf0cc4)
- Add setup_requires=["wheel"] in setup.py (https://github.com/makkoncept/pyvoc/commit/23302219b78a3381d9518c4b646ec9383b9495ea)

**[Commits from v1.2.0 till v1.3.0](https://github.com/makkoncept/pyvoc/compare/v1.2.0...v1.3.0)**

Added
- spell check and suggestions before API request using _enchant_ library (1)
- show custom groups in -l(--list) option.
Fixed
- UnicodeEncodeError on terminals without utf-8 encoding. (2)