Bump bindgen version.

NOTE: For $REASONS (see https://github.com/rust-lang/rust-bindgen/issues/1587),
this is not the actual commit that is tagged on the release.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2e13a21..fb6e787 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -105,6 +105,25 @@
 
 --------------------------------------------------------------------------------
 
+# 0.49.3
+
+Released 2019/06/25
+
+## Added
+
+* Various bindgen auto-generated types are now constructible in `const fn`
+  contexts [#1571][]
+
+* It is possible to generate `#[non_exhaustive]` enums for rust nightly targets.
+  [#1575][]
+
+* It is possible to avoid building clap now if you're using bindgen as
+  a library. [#1581][].
+
+[#1571]: https://github.com/rust-lang/rust-bindgen/issues/1571
+[#1575]: https://github.com/rust-lang/rust-bindgen/issues/1575
+[#1581]: https://github.com/rust-lang/rust-bindgen/issues/1581
+
 # 0.49.2
 
 Released 2019/05/22
diff --git a/Cargo.lock b/Cargo.lock
index 6d888b0..1e3dd61 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -49,7 +49,7 @@
 
 [[package]]
 name = "bindgen"
-version = "0.49.2"
+version = "0.49.3"
 dependencies = [
  "bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "cexpr 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/Cargo.toml b/Cargo.toml
index 5d558fe..fc167fc 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,7 +14,7 @@
 repository = "https://github.com/rust-lang/rust-bindgen"
 documentation = "https://docs.rs/bindgen"
 homepage = "https://rust-lang.github.io/rust-bindgen/"
-version = "0.49.2"
+version = "0.49.3"
 build = "build.rs"
 
 include = [
diff --git a/book/src/tutorial-1.md b/book/src/tutorial-1.md
index 3d5e751..c5f497a 100644
--- a/book/src/tutorial-1.md
+++ b/book/src/tutorial-1.md
@@ -4,12 +4,12 @@
 the `[build-dependencies]` section of our crate's `Cargo.toml` file.
 
 Please always use the latest version of `bindgen`, it has the most fixes and
-best compatibility. At the time of writing the latest bindgen is `0.49.2`, but
+best compatibility. At the time of writing the latest bindgen is `0.49.3`, but
 you can always check [the bindgen page of
 crates.io](https://crates.io/crates/bindgen) to verify the latest version if
 you're unsure.
 
 ```toml
 [build-dependencies]
-bindgen = "0.49.2"
+bindgen = "0.49"
 ```