Radians to degree and vice versa

[ghost]

Do the checklist before submitting the PR:

• [x] Have you read the guidelines mentioned in CONTRIBUTING.md?
• [x] Have you squashed your commits?

Q: What version of Node.js you've used in the project? (e.g. Node v10.11.0) A: v10.15.2

Q: Mention the Issue Number! (e.g. Fixed #8) A: Fixed #37

• Give additional information regarding the PR below:

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[codecov-io]

Codecov Report

Merging #60 into master will decrease coverage by 79.25%. The diff coverage is 16.66%.

@@             Coverage Diff             @@
##           master      #60       +/-   ##
===========================================
- Coverage     100%   20.74%   -79.26%     
===========================================
  Files          40       15       -25     
  Lines         403      135      -268     
===========================================
- Hits          403       28      -375     
- Misses          0      107      +107

Impacted Files	Coverage Δ
src/index.js	16.66% <16.66%> (-83.34%)	:arrow_down:
src/validation/frequency.js	11.11% <0%> (-88.89%)	:arrow_down:
src/bell/index.js	13.33% <0%> (-86.67%)	:arrow_down:
src/validation/integer-array.js	14.28% <0%> (-85.72%)	:arrow_down:
src/fibonacci/index.js	16.66% <0%> (-83.34%)	:arrow_down:
src/prime/index.js	17.64% <0%> (-82.36%)	:arrow_down:
src/catalan/index.js	20% <0%> (-80%)	:arrow_down:
src/carmichael/index.js	20% <0%> (-80%)	:arrow_down:
src/frequency/index.js	21.42% <0%> (-78.58%)	:arrow_down:
src/factorial/index.js	22.22% <0%> (-77.78%)	:arrow_down:
... and 30 more

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Continue to review full report at Codecov.

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[ghost]

@bharati-s please go through the contribution guidelines and codebase so as how to contribute before making a PR. You needed to make two modules radian & degree

@pbiswas101 i have made the changes

[ghost]

@bharati-s do not delete the src/index.js, otherwise your PR won't be checked against Travis CI & Codecov properly! You also need to update the README.md. I'd suggest to first go through the existing codebase and understand how things are working and ask me if you have any doubt before making all these commits!

@pbiswas101 okay Sorry. Since its my first time working with github i'm not sure how this works. couldyou please elaborate what changes I've to make?