Bump elliptic-curve to v0.13.0-pre

Breaking changes were introduced in #1024, so this bumps the crate
version to v0.13.0-pre to note that happened.

Note that there is no crate release associated with this version. When a
crate release occurs, it will be bumped to `-pre.0`.

Author: tarcieri

Cargo.lock

@@ -21,7 +21,7 @@ crypto-common = { version = "0.1", default-features = false, path = "../crypto-c
 aead = { version = "0.5", optional = true, path = "../aead" }
 cipher = { version = "0.4", optional = true }
 digest = { version = "0.10", optional = true, features = ["mac"] }
-elliptic-curve = { version = "0.12", optional = true, path = "../elliptic-curve" }
+elliptic-curve = { version = "0.12", optional = true } # TODO(tarcieri): path = "../elliptic-curve"
 password-hash = { version = "0.4", optional = true, path = "../password-hash" }
 signature = { version = "=2.0.0-pre.2", optional = true, default-features = false, path = "../signature" }
 universal-hash = { version = "0.5", optional = true, path = "../universal-hash" }

crypto/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "elliptic-curve"
-version = "0.12.3"
+version = "0.13.0-pre"
 description = """
 General purpose Elliptic Curve Cryptography (ECC) support, including types
 and traits for representing various elliptic curve forms, scalars, points,