Reverse Dependencies of extras-require

The following projects have a declared dependency on extras-require:

• kalendar — Datetime extensions for dekadal data
• ocha-anticipy — Access data for anticipating humanitarian risk
• PyIRI — Python implementation of International Reference Ionosphere
• PyIRTAM — Python tool for IRTAM using PyIRI
• pysatMadrigal — Madrigal instrument support for the pysat ecosystem
• pysatSpaceWeather — pysat support for Space Weather Indices