Add recent changes to the CHANGES file, which I forgot to do.

CHANGES

@@ -1,21 +1,29 @@
+## 0.9.0
+
+     * Support to generate C headers with C++ compatibility. https://github.com/eqrion/cbindgen/pull/349
+     * Fix include guard generation when no_includes is set. https://github.com/eqrion/cbindgen/pull/352
+     * Fix crate parsing order so that types from the binding crate are preferred in presence of conflicting names. https://github.com/eqrion/cbindgen/pull/355
+     * Add extra_bindings option to generate bindings for dependencies. https://github.com/eqrion/cbindgen/pull/362
+     * Clap dependency is optional now so it's feasible to avoid building it if cbindgen is used as a library. https://github.com/eqrion/cbindgen/pull/363
+
 ## 0.8.7
-    
+
      * Require C++11 to run the test-suite (#341, test-only)
      * Improve mangling error message (#340)
      * Add the ability to automatically derive copy-constructors for tagged enums (#339)
      * Use placement new for constructing in tagged unions' helper methods (#333)
 
 ## 0.8.6
-    
+
     * Fixed a panic when missing a lock file
 
 ## 0.8.5
-    
+
     * Improved support for Rust 2018 modules
     * Add possibility to autogenerate tagged union destructors
 
 ## 0.8.4
-    
+
     * Support for package renaming in Cargo.toml
     * Improved error messages for |cargo metadata| failures
     * Replaced 'test.py' harness with |cargo test|
@@ -24,25 +32,25 @@
     * Added a C99 doc comment style
 
 ## 0.8.2
-    
+
      * Improvements to bitflags parsing
 
 ## 0.8.1
-    
+
      * Support for manual parsing and expanding of bitflags macros
      * Support for optional tagged enum casts with asserts
 
 ## 0.8.0
-    
+
     * support for 'includes' without default includes
     * removed dependency on ancient serde_derive!
 
 ## 0.7.1
-    
+
     * Fix for crash when unwrapping unsupported type with associated constants
 
 ## 0.7.0
-    
+
     * support for libc::ssize_t
     * fixed some warnings on nightly
     * fix for transparent associated constants
@@ -51,7 +59,7 @@
     * now support putting user-defined content in item bodies
 
 ## 0.6.8
-    
+
     * ptrdiff_t is now a recognized primitive type
     * named function type arguments are now propagated
     * fixes for struct literals in constants