Release v0.1.2

What's Changed

• Use pd.concat instead of pyam.concat by @lewisjared in #33
• Update pyam to >=1.7.0 by @phackstock in #31
• Update documentation for citations and input file formats by @jkikstra in #26

New Contributors

• @lewisjared made their first contribution in #33

Full Changelog: v0.1.1...v0.1.2