v1.2.0

What's Changed

• Remove vec! from the compound-types slides by @jonathanpallant in #58
• Update installation.md by @jonathanpallant in #59
• Tweak Day 3 material by @jonathanpallant in #60
• Methods and traits by @jonathanpallant in #62
• Add generics slides by @jonathanpallant in #63
• Lifetimes Intro slides by @listochkin in #64
• Made some small changes to aid my understanding. by @jonathanpallant in #65

Full Changelog: v1.1.0...v1.2.0