Add complex gematria

[avi-perl]

Type of changes

• [ ] 🐛 Bug fix
• [x] 🎁 New feature
• [x] 📄 Documentation / docstrings
• [x] 🧪 Tests
• [ ] Other

Checklist

• [x] 💻 I've run the latest black with default args on new code.
• [x] 🧪 I've added tests for new code.
• [x] ✔️ I ran pytest with the --codeblocks flag to ensure that my changes are compatible with the codeblocks found in the documentation.
• [x] 🕵️ I accept that @avi-perl may be pedantic (just a little) in the code review.

Description

Please describe your changes here. If this fixes a bug, please link to the issue, if possible.

[codecov-commenter]

Codecov Report

Merging #8 (6a07869) into master (fc0032e) will not change coverage. The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master        #8   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           19        10    -9     
  Lines          715       709    -6     
=========================================
- Hits           715       709    -6     

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

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

Impacted Files	Coverage Δ
hebrew/__init__.py	100.00% <100.00%> (ø)
hebrew/chars.py	100.00% <100.00%> (ø)
hebrew/gematria.py	100.00% <100.00%> (ø)
hebrew/hebrew_obj.py	100.00% <100.00%> (ø)
tests/test_gematria.py	100.00% <100.00%> (ø)

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