Bump enumflags2 from 0.6.4 to 0.7.4

Bumps [enumflags2](https://github.com/NieDzejkob/enumflags2) from 0.6.4 to 0.7.4.
- [Release notes](https://github.com/NieDzejkob/enumflags2/releases)
- [Commits](meithecatte/enumflags2@v0.6.4...v0.7.4)

---
updated-dependencies:
- dependency-name: enumflags2
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -15,7 +15,7 @@ targets = ["x86_64-unknown-linux-gnu"]
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive", "max-encoded-len"] }
 scale-info = { version = "2.0.1", default-features = false, features = ["derive"] }
-enumflags2 = { version = "0.6.2" }
+enumflags2 = { version = "0.7.4" }
 sp-std = { version = "4.0.0", default-features = false, path = "../../primitives/std" }
 sp-io = { version = "6.0.0", default-features = false, path = "../../primitives/io" }
 sp-runtime = { version = "6.0.0", default-features = false, path = "../../primitives/runtime" }