PySPEDAS v2.1.2

What's Changed

• Use datatype to allow STEREO LFR loading by @pulupa in #1356
• Parker Solar Probe FIELDS RFS burst data is only available as L2 by @pulupa in #1361
• Fix tplot crash when using Y-axis interpolation for spectrograms with linear Y scaling
• Explicitly convert returned FSDN objects to strings (mth5 API has changed in more recent versions), removed upper version pins on mth5 and its dependencies
• Replaced deprecated "IRIS" service name with "EARTHSCOPE" in mth5 code
• Bumped version requirement for hapiclient to pick up bug fix in version 0.2.9

Full Changelog: v2.1.1...v2.1.2