Release v0.7.0

What's Changed

• add joss paper pdf conversion via gha by @valeriupredoi in #97
• fix changelog to include Kai as contributor to v0.6.0 and change Brian L -> Bryan L (typos) by @valeriupredoi in #96
• New logo by @valeriupredoi in #98
• fix Enum and Empty attributes by @kmuehlbauer in #102
• Fix user datatypes (enum, compound) by @kmuehlbauer in #105
• Added partial support for compact datasets. by @zequihg50 in #107
• fix handling of uninitialized vlen strings by @kmuehlbauer in #110
• add dataobjects.dtype to DatasetMeta by @kmuehlbauer in #112

All changes with review from @bnlawrence @davidhassell and @bmaranville - very many thanks 🍻

Full Changelog: v0.6.0...v0.7.0