Prepare for release of 0.2.0-alpha.6 (#1617)

Note that `tokio-timer` and `tokio-tls` become 0.3.0-alpha.6 (not 0.2.0)

tokio-io/CHANGELOG.md

@@ -1,3 +1,8 @@
+# 0.2.0-alpha.6 (September 30, 2019)
+
+- Move to `futures-*-preview 0.3.0-alpha.19`
+- Move to `pin-project 0.4`
+
 # 0.2.0-alpha.5 (September 19, 2019)
 
 ### Added

tokio-io/Cargo.toml

@@ -7,13 +7,13 @@ name = "tokio-io"
 #   - Cargo.toml
 # - Update CHANGELOG.md.
 # - Create "v0.1.x" git tag.
-version = "0.2.0-alpha.5"
+version = "0.2.0-alpha.6"
 edition = "2018"
 authors = ["Tokio Contributors <[email protected]>"]
 license = "MIT"
 repository = "https://github.com/tokio-rs/tokio"
 homepage = "https://tokio.rs"
-documentation = "https://docs.rs/tokio-io/0.2.0-alpha.5/tokio_io"
+documentation = "https://docs.rs/tokio-io/0.2.0-alpha.6/tokio_io"
 description = """
 Core I/O primitives for asynchronous I/O in Rust.
 """
@@ -30,8 +30,8 @@ memchr = { version = "2.2", optional = true }
 pin-project = { version = "0.4", optional = true }
 
 [dev-dependencies]
-tokio = { version = "=0.2.0-alpha.5", path = "../tokio" }
-tokio-test = { version = "=0.2.0-alpha.5", path = "../tokio-test" }
+tokio = { version = "=0.2.0-alpha.6", path = "../tokio" }
+tokio-test = { version = "=0.2.0-alpha.6", path = "../tokio-test" }
 
 futures-util-preview = "=0.3.0-alpha.19"
 

tokio-io/src/lib.rs

@@ -1,4 +1,4 @@
-#![doc(html_root_url = "https://docs.rs/tokio-io/0.2.0-alpha.5")]
+#![doc(html_root_url = "https://docs.rs/tokio-io/0.2.0-alpha.6")]
 #![warn(
     missing_debug_implementations,
     missing_docs,