v0.8.6

SymbolicNumericIntegration v0.8.6

Diff since v0.8.5

Merged pull requests:

• format SciML Style (#17) (@ChrisRackauckas)
• doc cov (#19) (@ArnoStrouwen)
• [skip ci] badges (#20) (@ArnoStrouwen)
• Add Invalidations.yml [skip ci] [skip tests] (#22) (@devmotion)
• add citation in readme (#24) (@anandijain)
• updated README and make.jl as per sciml template (#25) (@00krishna)
• canonize docs (#26) (@ArnoStrouwen)