feat(cli): create output folder if it's not present. (#280)

[Ghustavh97]

Summary

Creates the destination/output folder if it is not preset and the
--dest-create flag is provided in the command.

I decided to make it a command instead of just creating the
folder just incase the provided destination path was a mistake or
a typo and you don't want your fonts to be exported there.

Proposed changes

This PR brings the following changes:

• Add flag dist-create with alias m to cli

Related issue

Fixes #280

Dependencies added/removed (if applicable)

N/A

---

Testing

• I have added or updated tests that prove my fix is effective or that my feature works (if applicable)
  • Unit test
  • Snapshot test
  • Manual test
  • Another test...

How to test

Describe the tests that you ran to verify your changes:

1. Run npm test

Test configuration

• Node.js version: v12.18.0
• NPM version: 6.14.4

---

Checklist

• I have added corresponding labels to this PR (like bug, enhancement...);
• My commits follow the Conventional Commits 1.0 Guidelines;
• My code follows the style guidelines of this project;
• I have performed a self-review of my own code;
• I have mapped technical debts found on my changes;
• I have made corresponding changes to the documentation (if applicable);
• My changes generate no new warnings or errors;

[codecov-io]

Codecov Report

Merging #307 (746c7b4) into master (2b4c1fb) will increase coverage by 0.24%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #307      +/-   ##
==========================================
+ Coverage   92.09%   92.34%   +0.24%     
==========================================
  Files           2        2              
  Lines         215      222       +7     
  Branches       30       30              
==========================================
+ Hits          198      205       +7     
  Misses         17       17              

Impacted Files	Coverage Δ
src/cli.js	85.41% <100.00%> (+1.14%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 2b4c1fb...746c7b4. Read the comment docs.

[jimmyandrade]

Hello @Ghustavh97

Your PR was merged at d66a0d4 and released as Webfont 10.1.0, already available at npm.

Thanks for contributing!