Updating podspec to 1.9.1 (#336)

Bolts 1.9.0 🔩

Bolts 1.8.4 🔩 (#271)

Bolts 1.8.3 🔩 (#269)

Bolts 1.8.2 🔩 (#267)

Bolts 1.8.1 🔩 (#261)

Bolts 1.8.0 🔩 (#259)

Merge pull request #244 from BoltsFramework/nlutsenko.170

Bolts 1.7.0 🔩

Merge pull request #219 from BoltsFramework/nlutsenko.160

Bolts 1.6.0 🔩

Merge pull request #209 from BoltsFramework/nlutsenko.151

Bolts 1.5.1 🔩