Update dependencies that had breaking changes

[mooori]

The following dependencies have breaking changes:

• bitflags: Used by AccessControllable to encode permissions for storage.
• toml: Used in tests to read rust-toolchain files.
• darling: Usage is related to proc macros
• syn: Usage is related to proc macros
• proc-macro-crate: Usage is related to proc macros
• Upcoming: a new major version of near-sdk is in alpha
  • Remove the dependency patch added in build: add workarounds required to build tests #128

We should investigate whether any of these breaking changes affect near-plugins and do the migrations required to upgrade these dependencies. Breaking changes for users of near-plugins should be minized and be accompanied by migration guidelines.

Some of these dependencies had major versions bumps, others are still at v0.* and introduce breaking changes with minor version bumps.