Update README and CHANGELOG, see #650

CHANGELOG.md

@@ -24,6 +24,8 @@
 
 ## Packaging
 
+- Compilation problems with `onig_sys` on various platforms have been resolved by upgrading to `syntect 4.2`, which includes a new `onig` version that allows to build `onig_sys` without the `bindgen` dependency. This removes the need for `libclang(-dev)` to be installed to compile `bat`. Package maintainers might want to remove `clang` as a build dependency. See #650 for more details.
+
 # v0.15.1
 
 ## Bugfixes

README.md

@@ -365,8 +365,6 @@ higher. You can then use `cargo` to build everything:
 cargo install --locked bat
 ```
 
-On some platforms, you might need to install `llvm` and/or `libclang-dev`.
-
 ## Customization
 
 ### Highlighting theme