Changelog

2.0.0-> 2.0.1

Patch release with backports to fix broken nightly builds.
Namely contains backports of

• #7381: Make Substrate compile with latest nightly
• #7238: Fix compilation with environmental on latest nightly
• #7395: Make benchmarks compile with latest nightly
• #7838: Fix incorrect use of syn::exports (partially)
• #7854: Update to futures 0.3.9