heaps.py supports list, tuple and pydatastructs.Array

[HarsheetKakar]

Originally in the doctstring it was written that heap expects list/tuple but it was actually taking DODA, so I have made changes to accept list, tuple and Array and derivative objects.

References to other Issues or PRs or Relevant literature

Brief description of what is fixed or changed

Other comments

[codecov]

Codecov Report

Merging #218 into master will increase coverage by 1.627%.
The diff coverage is 100.000%.

@@              Coverage Diff              @@
##            master      #218       +/-   ##
=============================================
+ Coverage   96.937%   98.564%   +1.627%     
=============================================
  Files           24        24               
  Lines         1959      2090      +131     
=============================================
+ Hits          1899      2060      +161     
+ Misses          60        30       -30     

Impacted Files	Coverage Δ
pydatastructs/trees/heaps.py	97.837% <100.000%> (+0.035%)	⬆️
pydatastructs/graphs/__init__.py	100.000% <0.000%> (ø)
pydatastructs/graphs/algorithms.py	100.000% <0.000%> (ø)
pydatastructs/graphs/adjacency_list.py	100.000% <0.000%> (ø)
pydatastructs/graphs/adjacency_matrix.py	100.000% <0.000%> (ø)
pydatastructs/linear_data_structures/__init__.py	100.000% <0.000%> (ø)
pydatastructs/linear_data_structures/algorithms.py	100.000% <0.000%> (ø)
...datastructs/linear_data_structures/linked_lists.py	99.613% <0.000%> (+0.006%)	⬆️
...datastructs/miscellaneous_data_structures/queue.py	100.000% <0.000%> (+1.333%)	⬆️
pydatastructs/utils/misc_util.py	100.000% <0.000%> (+9.259%)	⬆️
... and 1 more

[HarsheetKakar]

@czgdp1807 please check this one too

[czgdp1807]

This highlights a potential flaw. Will look more into it before commenting further.

[HarsheetKakar]

This highlights a potential flaw. Will look more into it before commenting further.

are you working on it yourself or shall I raise an issue listing all the problems with array.py?

[HarsheetKakar]

That was lame, I'm so sorry that I didn't figure it out on my own. Thanks for helping me out.