Bump rand_core dependency to v0.10 (#7)

Also bumps `rustcrypto-ff` to v0.14.0-rc.0

Author: tarcieri

Cargo.lock

@@ -16,10 +16,10 @@ homepage = "https://github.com/RustCrypto/group"
 repository = "https://github.com/RustCrypto/group"
 
 [dependencies]
-chacha20 = { version = "0.10.0-rc.9", optional = true, default-features = false, features = ["rng"] }
-ff = { version = "=0.14.0-pre.1", package = "rustcrypto-ff", default-features = false }
-rand = { version = "0.10.0-rc.1", optional = true, default-features = false }
-rand_core = { version = "0.10.0-rc-6", default-features = false }
+chacha20 = { version = "0.10.0-rc.10", optional = true, default-features = false, features = ["rng"] }
+ff = { version = "0.14.0-rc.0", package = "rustcrypto-ff", default-features = false }
+rand = { version = "0.10.0-rc.8", optional = true, default-features = false }
+rand_core = { version = "0.10", default-features = false }
 #rand_xorshift = { version = "0.5.0-rc.0", optional = true }
 subtle = { version = "2.2.1", default-features = false }
 
@@ -37,4 +37,3 @@ maintenance = { status = "actively-developed" }
 
 [patch.crates-io.rand]
 git = "https://github.com/rust-random/rand"
-branch = "rand_core/v0.10.0-rc-6"