Updated object to class name #57

[TarunTomar122]

fixes #57

Brief description of what is fixed or changed

Replaced lines having object.new to base class name new..

Other comments

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (master@89c43ae). Click here to learn what that means.
The diff coverage is 100%.

@@            Coverage Diff            @@
##             master      #63   +/-   ##
=========================================
  Coverage          ?   98.17%           
=========================================
  Files             ?       19           
  Lines             ?     1257           
  Branches          ?        0           
=========================================
  Hits              ?     1234           
  Misses            ?       23           
  Partials          ?        0

Impacted Files	Coverage Δ
...datastructs/miscellaneous_data_structures/stack.py	92.307% <100%> (ø)
pydatastructs/trees/heaps.py	98.591% <100%> (ø)

[czgdp1807]

Make the changes at the following place as well,

pydatastructs/pydatastructs/trees/heaps.py

Line 70 in 27d3ed8

obj = object.__new__(cls)

[TarunTomar122]

But Binary heap is not inheriting any other class than object class itself!

[czgdp1807]

Well, then we need to make it inherit, Heap and then make the change. In future, there may be a need to shift some common methods to the topmost class.

[czgdp1807]

Thanks. Merging.