v1.1.12

Minor updates:

• Added new example to demonstrate market basket analysis.

from hnet import hnet
hn = hnet()
df = hn.import_example('grocery')
results = hn.association_learning(df)
hn.d3graph(summarize=True)
hn.d3heatmap(summarize=True)

• Update url link
• Update example in docstring
• Some code styling