Glutin Version v0.30.0-beta.3

• Config doesn't force OpenGL Api by default.
• Display::create_context now uses the most recent available Api from the Config when ContextApi is not specified in ContextAttributes.
• Breaking: PossiblyCurrentGlContext::get_proc_address method was moved to GlDisplay::get_proc_address.
• Breaking: ConfigTemplateBuilder::with_sample_buffers now called ConfigTemplateBuilder::with_multisampling.
• Breaking: GlConfig::sample_buffers now called GlConfig::num_samples and returns the amount of samples in multisample buffer.
• Breaking: Bump MSRV from 1.57 to 1.60.
• Fix GlProfile::Core requesting without explicit version.
• Pick the latest available profile on macOS.
• When using ContextApi::Gles(None) in ContextAttributesBuilder the latest known supported major ES version will be picked.
• Fix Eq implementation for Config on CGL.
• Add GetDisplayExtensions trait to obtain api display extensions implemented on EGL, WGL, and GLX.
• Fallback to Surface::swap_buffers when Surface::swap_buffers_with_damage is not supported on EGL.
• Add missing GetGlConfig implementation for NotCurrentContext and PossiblyCurrentContext.
• Implement Clone for builders.
• Breaking: move DamageRect into surface::Rect.
• Add GlDisplay::version_string to help with logging the display information.
• Rename NotCurrentGlContext::treat_as_current to NotCurrentGlContext::treat_as_possibly_current.
• Rename Display::from_raw to Display::new.
• Added GlDisplay::supported_features to allow checking for extensions support beforehand.
• Breaking: renamed ReleaseBehaviour to ReleaseBehavior.
• Fix GLX not working with nvidia binary drivers.
• Fix crash in glx::surface::Surface::set_swap_interval.