Ratio type bug

[sepandhaghighi]

Reference Issues/PRs

10

What does this implement/fix? Explain your changes.

• is_int function added
• README.md updated
• --coffee-ratio type changed from int to float
• --water-ratio type changed from int to float
• coffee_calc function updated

  Any other comments?

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 100.00%. Comparing base (b07e052) to head (490aa2b). Report is 1 commits behind head on dev.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## dev #15 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 2 2 Lines 47 54 +7 Branches 8 10 +2 ========================================= + Hits 47 54 +7 ```

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[sepandhaghighi]

@sadrasabouri Kindly review this pull request. Once it's approved, please remember to Squash/Merge it. Thank you!