v0.19.2

New features

• Add nonnull/NonNullable builtin type (#1875) (42883cb)

Other

• update binaryen to 101.0.0-nightly.20210604 (#1885) (ee5016c)
• Refactor and clean up Binaryen bindings (#1889) (bee6a9f)
• Sync README with docs (f354678)