v0.4.2

FrankWolfe v0.4.2

Diff since v0.4.1

Merged pull requests:

• Lazy block updates (#490) (@zevwoodstock)
• BPCG with direct solve extension (#507) (@pokutta)
• sparsifier active set (#508) (@matbesancon)
• inverse to linsolve for AS quadratic (#510) (@matbesancon)
• Quadratic solve structure (#511) (@matbesancon)
• Update Block-Coordinate FW (#512) (@JannisHal)
• Alternating projection update (#513) (@JannisHal)
• Update Project.toml (#514) (@matbesancon)
• Actually use Backtracking in Secant (#517) (@dhendryc)
• fix sparsify types (#518) (@matbesancon)
• Revert inverse syntax (#520) (@sebastiendesignolle)

Closed issues:

• kwargs for compute_extreme_point(lmo, direction)? (#399)
• Quadratic detection is off by multiplicative constant (#516)