Version 1.0 🚀

This the full release for Wagtail Localize 1.0

Changes since v1.0rc4:

• Handle configurable comments relation (Wagtail 2.15 fix) (@gasman)
  This release is fully compatible with Wagtail 2.15
• Add means to disable the default translation mode (@zerolab, sponsored by Instrument)
  See documentation
• Add pre-commit support and lint using black(@zerolab)
• Allow overriding chooser blocks defined in StructBlocks (@zerolab)