Fixed dependency checks for pyviz

Parth Pratim Chatterjeerequested to merge
ParthPratim1/bake:pyviz into master

Signed-off-by: Parth Pratim Chatterjee parth27official@gmail.com

Thank you @tomhenderson sir for pointing out the correct file installations for pygobject,pygraphviz and gicairo.

This MR resolves the issue #12 (closed)

Edited by Parth Pratim Chatterjee

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