Merge image transforms dimensions for image representation envs; also minigrid and procgen examples

[RaghuSpaceRajan]

No description provided.

[codecov]

Codecov Report

Merging #14 (0754b42) into master (e576057) will decrease coverage by 0.00%.
The diff coverage is 61.81%.

@@            Coverage Diff             @@
##           master      #14      +/-   ##
==========================================
- Coverage   68.83%   68.82%   -0.01%     
==========================================
  Files          30       30              
  Lines        3748     3888     +140     
==========================================
+ Hits         2580     2676      +96     
- Misses       1168     1212      +44     

Flag	Coverage Δ
unittests	68.82% <61.81%> (-0.01%)	⬇️

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Impacted Files	Coverage Δ
example.py	0.00% <0.00%> (ø)
setup.py	0.00% <ø> (ø)
mdp_playground/envs/gym_env_wrapper.py	79.65% <86.02%> (+4.12%)	⬆️
mdp_playground/envs/__init__.py	100.00% <100.00%> (ø)
tests/test_gym_env_wrapper.py	79.69% <100.00%> (+3.38%)	⬆️

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