ability to create donut chart

[ratnajeetshyamkunwar]

Explanation About What Code Achieves:

• Provides the ability to create Donut charts

Screenshots/GIFs:

Steps To Test:

• Import Charts
• specify type as donut

TODOs:

• None

[coveralls]

Pull Request Test Coverage Report for Build 78

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 38.158%

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Totals
Change from base Build 71:	0.0%
Covered Lines:	29
Relevant Lines:	62

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 79

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 38.158%

---

Totals
Change from base Build 71:	0.0%
Covered Lines:	29
Relevant Lines:	62

---

💛 - Coveralls

[scmmishra]

Hi, I've suggested some code improvements, regarding formatting. The logic seems to be fine.