Bump darling from 0.14.1 to 0.20.8

Bumps [darling](https://github.com/TedDriggs/darling) from 0.14.1 to 0.20.8.
- [Release notes](https://github.com/TedDriggs/darling/releases)
- [Changelog](https://github.com/TedDriggs/darling/blob/master/CHANGELOG.md)
- [Commits](TedDriggs/darling@v0.14.1...v0.20.8)

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

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

Author: dependabot[bot]

Cargo.lock

@@ -19,7 +19,7 @@ compat-program-result = ["anchor-idl/compat-program-result"]
 
 [dependencies]
 anchor-idl = { version = "0.3.0", path = "../anchor-idl" }
-darling = "0.14"
+darling = "0.20"
 syn = { version = "1", features = ["full"] }
 
 [dev-dependencies]

crates/anchor-generate-cpi-interface/Cargo.toml

@@ -13,7 +13,7 @@ compat-program-result = []
 
 [dependencies]
 anchor-syn = { version = "0.24.2", features = ["idl"] }
-darling = "0.14"
+darling = "0.20"
 heck = "0.4.1"
 proc-macro2 = "1"
 quote = "1"