Fix version no

[SarthakJariwala]

• Fixes Incorrect version number using ezconda version #28
• Adds importlib-metadata as dependency
• Minimum python version is now 3.7

[codecov-commenter]

Codecov Report

Merging #30 (a00e7a0) into main (f8dcc94) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #30      +/-   ##
==========================================
+ Coverage   90.59%   90.61%   +0.02%     
==========================================
  Files          15       15              
  Lines         457      458       +1     
==========================================
+ Hits          414      415       +1     
  Misses         43       43              

Impacted Files	Coverage Δ
ezconda/__init__.py	100.00% <100.00%> (ø)

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