Adding teams support

[sedan07]

Pull Request Template

Description

Adds support for the teams API endpoint as documented here: https://grafana.com/docs/http_api/team/

Have you written tests?

• Yes
• No

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings

[codecov]

Codecov Report

Merging #23 into master will increase coverage by 8.52%.
The diff coverage is 98.7%.

@@            Coverage Diff             @@
##           master      #23      +/-   ##
==========================================
+ Coverage   43.93%   52.45%   +8.52%     
==========================================
  Files          12       13       +1     
  Lines         412      488      +76     
==========================================
+ Hits          181      256      +75     
- Misses        231      232       +1

Impacted Files	Coverage Δ
grafana_api/grafana_face.py	100% <100%> (ø)	⬆️
grafana_api/api/__init__.py	100% <100%> (ø)	⬆️
grafana_api/api/team.py	98.64% <98.64%> (ø)

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[m0nhawk]

Thank you for adding Teams support!