chore: Prepare 0.1.0-beta.1 release (#200)

* chore: Prepare `0.1.0-beta.1` release

* Update changelog

* Fix tower paths

tonic-build/Cargo.toml

@@ -1,10 +1,10 @@
 [package]
 name = "tonic-build"
-version = "0.1.0-alpha.6"
+version = "0.1.0-beta.1"
 authors = ["Lucio Franco <[email protected]>"]
 edition = "2018"
 license = "MIT"
-documentation = "https://docs.rs/tonic/0.1.0-alpha.5/tonic/"
+documentation = "https://docs.rs/tonic/0.1.0-beta.1/tonic/"
 repository = "https://github.com/hyperium/tonic"
 homepage = "https://github.com/hyperium/tonic"
 description = """

tonic-build/src/lib.rs

@@ -53,7 +53,7 @@
 #![doc(
     html_logo_url = "https://github.com/hyperium/tonic/raw/master/.github/assets/tonic-docs.png"
 )]
-#![doc(html_root_url = "https://docs.rs/tonic-build/0.1.0-alpha.6")]
+#![doc(html_root_url = "https://docs.rs/tonic-build/0.1.0-beta.1")]
 #![doc(issue_tracker_base_url = "https://github.com/hyperium/tonic/issues/")]
 #![doc(test(no_crate_inject, attr(deny(rust_2018_idioms))))]