Add extra docs and tests for param types.

[tiangolo]

📝 Add extra docs and tests for param types.

[codecov-io]

Codecov Report

Merging #30 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #30      +/-   ##
==========================================
+ Coverage   99.96%   99.96%   +<.01%     
==========================================
  Files         147      157      +10     
  Lines        2583     2758     +175     
==========================================
+ Hits         2582     2757     +175     
  Misses          1        1

Impacted Files	Coverage Δ
...test_parameter_types/test_bool/test_tutorial001.py	100% <100%> (ø)
docs/src/parameter_types/number/tutorial003.py	100% <100%> (ø)
docs/src/parameter_types/bool/tutorial004.py	100% <100%> (ø)
...test_parameter_types/test_bool/test_tutorial002.py	100% <100%> (ø)
...test_parameter_types/test_bool/test_tutorial003.py	100% <100%> (ø)
docs/src/parameter_types/bool/tutorial001.py	100% <100%> (ø)
...test_parameter_types/test_bool/test_tutorial004.py	100% <100%> (ø)
docs/src/parameter_types/bool/tutorial003.py	100% <100%> (ø)
docs/src/parameter_types/bool/tutorial002.py	100% <100%> (ø)
...st_parameter_types/test_number/test_tutorial003.py	100% <100%> (ø)
... and 10 more

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