Bump curve25519-dalek from 2.0.0 to 2.1.0

Bumps [curve25519-dalek](https://github.com/dalek-cryptography/curve25519-dalek) from 2.0.0 to 2.1.0.
- [Release notes](https://github.com/dalek-cryptography/curve25519-dalek/releases)
- [Changelog](https://github.com/dalek-cryptography/curve25519-dalek/blob/master/CHANGELOG.md)
- [Commits](https://github.com/dalek-cryptography/curve25519-dalek/compare/2.0.0...2.1.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Cargo.lock

@@ -745,9 +745,9 @@ dependencies = [
 
 [[package]]
 name = "curve25519-dalek"
-version = "2.0.0"
+version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "26778518a7f6cffa1d25a44b602b62b979bd88adb9e99ffec546998cf3404839"
+checksum = "5d85653f070353a16313d0046f173f70d1aadd5b42600a14de626f0dfb3473a5"
 dependencies = [
  "byteorder",
  "digest",
@@ -901,7 +901,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "978710b352437433c97b2bff193f2fb1dfd58a093f863dd95e225a19baa599a2"
 dependencies = [
  "clear_on_drop",
- "curve25519-dalek 2.0.0",
+ "curve25519-dalek 2.1.0",
  "rand 0.7.3",
  "serde",
  "sha2",
@@ -3977,7 +3977,7 @@ dependencies = [
  "backtrace",
  "bytes 0.4.12",
  "cc",
- "curve25519-dalek 2.0.0",
+ "curve25519-dalek 2.1.0",
  "ed25519-dalek",
  "either",
  "failure",
@@ -4435,7 +4435,7 @@ name = "solana-perf"
 version = "1.3.0"
 dependencies = [
  "bincode",
- "curve25519-dalek 2.0.0",
+ "curve25519-dalek 2.1.0",
  "dlopen",
  "dlopen_derive",
  "lazy_static",
@@ -6354,7 +6354,7 @@ version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "637ff90c9540fa3073bb577e65033069e4bae7c79d49d74aa3ffdf5342a53217"
 dependencies = [
- "curve25519-dalek 2.0.0",
+ "curve25519-dalek 2.1.0",
  "rand_core 0.5.1",
  "zeroize",
 ]