Type method in SerializableBase returns instead of raise

[malik-irain]

solves #59

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 73.59%. Comparing base (9058506) to head (2ff2a3f).
⚠️ Report is 10 commits behind head on 0.0.x_dev.

Files with missing lines	Patch %	Lines
src/pymodaq_utils/serialize/factory.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           0.0.x_dev      #62   +/-   ##
==========================================
  Coverage      73.59%   73.59%           
==========================================
  Files             18       18           
  Lines           1598     1602    +4     
==========================================
+ Hits            1176     1179    +3     
- Misses           422      423    +1     

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