Compilation-Guide.md

-The dav1d AV1 decoder uses the [Meson build system][meson]. To compile dav1d, **Meson 0.47 or higher** and [Ninja][ninja] are required.
+The dav1d AV1 decoder uses the [Meson build system][meson]. To compile dav1d, **Meson 0.49 or higher** and [Ninja][ninja] are required.
 
 ## Basic compilation