Update older version nums in futures-test

Author: taiki-e

futures-test/Cargo.toml

@@ -6,7 +6,7 @@ authors = ["Wim Looman <wim@nemo157.com>"]
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/rust-lang-nursery/futures-rs"
 homepage = "https://rust-lang-nursery.github.io/futures-rs"
-documentation = "https://rust-lang-nursery.github.io/futures-doc/0.3.0-alpha.5/futures_test"
+documentation = "https://rust-lang-nursery.github.io/futures-doc/0.3.0-alpha.12/futures_test"
 description = """
 Common utilities for testing components built off futures-rs.
 """
@@ -15,13 +15,13 @@ Common utilities for testing components built off futures-rs.
 name = "futures_test"
 
 [dependencies]
-futures-core-preview = { version = "0.3.0-alpha.2", path = "../futures-core", default-features = false }
-futures-util-preview = { version = "0.3.0-alpha.2", path = "../futures-util", default-features = false }
-futures-executor-preview = { version = "0.3.0-alpha.2", path = "../futures-executor", default-features = false }
+futures-core-preview = { version = "=0.3.0-alpha.12", path = "../futures-core", default-features = false }
+futures-util-preview = { version = "=0.3.0-alpha.12", path = "../futures-util", default-features = false }
+futures-executor-preview = { version = "=0.3.0-alpha.12", path = "../futures-executor", default-features = false }
 pin-utils = { version = "0.1.0-alpha.4", default-features = false }
 
 [dev-dependencies]
-futures-preview = { version = "0.3.0-alpha.2", path = "../futures", default-features = false, features = ["std"] }
+futures-preview = { version = "=0.3.0-alpha.12", path = "../futures", default-features = false, features = ["std"] }
 
 [features]
 default = ["std"]