Added readthedocs condig file

[czgdp1807]

References to other Issues or PRs or Relevant literature

Brief description of what is fixed or changed

Other comments

[codecov]

Codecov Report

Merging #417 (2ff7dbe) into master (652b44e) will not change coverage.
The diff coverage is n/a.

❗ Current head 2ff7dbe differs from pull request most recent head 910e08c. Consider uploading reports for the commit 910e08c to get more accurate results

@@            Coverage Diff            @@
##            master      #417   +/-   ##
=========================================
  Coverage   98.611%   98.611%           
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  Files           27        27           
  Lines         3529      3529           
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  Hits          3480      3480           
  Misses          49        49           

Impacted Files	Coverage Δ
pydatastructs/trees/binary_trees.py	97.818% <ø> (ø)