Add latest metric prefixes: ronna, ronto, quetta, quecto

[H4ckerxx44]

• Add missing SI-prefixes

Changes proposed in this pull request:
Due to the fact that humanize is missing the prefixes added on the 27th meeting of the CGPM (Conférence générale des poids et mesures), I decided to add those to the metric() method as well as the tests.

The new prefixes can be found here or as I have listed below.

• Quetta: $10^{30}$
• Ronna: $10^{27}$
• ronto: $10^{-27}$
• quecto: $10^{-30}$

[hugovk]

Thank you!

Please could you fix the tests, and add a test case for quetta/Q?

[H4ckerxx44]

Thank you!

Please could you fix the tests, and add a test case for quetta/Q?

Should be done.

[codecov-commenter]

Codecov Report

Merging #78 (53e35a9) into main (79c240d) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #78   +/-   ##
=======================================
  Coverage   99.19%   99.19%           
=======================================
  Files           9        9           
  Lines         741      741           
=======================================
  Hits          735      735           
  Misses          6        6           

Flag	Coverage Δ
macos-latest	97.57% <100.00%> (ø)
ubuntu-latest	97.57% <100.00%> (ø)
windows-latest	96.08% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
tests/test_number.py	100.00% <ø> (ø)
src/humanize/number.py	96.96% <100.00%> (ø)

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[hugovk]

Thank you!