Update derive-getters requirement from 0.3.0 to 0.4.0 (#651)

Updates the requirements on derive-getters to permit the latest version.

---
updated-dependencies:
- dependency-name: derive-getters
  dependency-type: direct:production
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

frost-core/Cargo.toml

@@ -26,7 +26,7 @@ byteorder = "1.4"
 const-crc32 = "1.2.0"
 document-features = "0.2.7"
 debugless-unwrap = "0.0.4"
-derive-getters = "0.3.0"
+derive-getters = "0.4.0"
 hex = "0.4.3"
 postcard = { version = "1.0.0", features = ["use-std"], optional = true }
 rand_core = "0.6"

frost-rerandomized/Cargo.toml

@@ -20,7 +20,7 @@ features = ["serde"]
 rustdoc-args = ["--cfg", "docsrs"]
 
 [dependencies]
-derive-getters = "0.3.0"
+derive-getters = "0.4.0"
 document-features = "0.2.7"
 frost-core = { path = "../frost-core", version = "1.0.0", features = ["internals"] }
 rand_core = "0.6"