Replace LightGraphs.jl with Graphs.jl

[coveralls]

Pull Request Test Coverage Report for Build 1657715707

• 11 of 12 (91.67%) changed or added relevant lines in 1 file are covered.
• 6 unchanged lines in 4 files lost coverage.
• Overall coverage decreased (-0.04%) to 96.261%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/extra/cycles.jl	11	12	91.67%
<!--	Total:	11	12	91.67%	-->

Files with Coverage Reduction	New Missed Lines	%
src/base/chainelement.jl	1	96.1%
src/filtrations/cubical.jl	1	98.63%
src/base/abstractfiltration.jl	2	88.57%
src/extra/circularcoordinates.jl	2	94.24%
<!--	Total:	6		-->

Totals
Change from base Build 1345191630:	-0.04%
Covered Lines:	1622
Relevant Lines:	1685

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💛 - Coveralls