v0.3.9

FrankWolfe v0.3.9

Diff since v0.3.8

Merged pull requests:

• added tullio (#493) (@matbesancon)
• Secant fix (#495) (@matbesancon)
• Dual gap issue in BPCG (#497) (@dhendryc)
• BPCG - Real dual gap in Post Processing (#498) (@dhendryc)
• Update Project.toml (#499) (@matbesancon)

Closed issues:

• BPCG Dual Gap Issue (#496)