REL: v0.2.0

What's Changed

• Bump pip from 19.2.3 to 21.1 by @dependabot in #12
• FIX: Skip variables that aren't present in the dataset by @greglucas in #14
• Preparing for a new release v0.2.0 by @greglucas in #15

Full Changelog: v0.1.0...v0.2.0