Derive Default, Eq and PartialEq for the reports (#66)

There was already a default implementation for KeyboardReport but it can
be derived as well.

Also derive Eq & PartialEq to be able to know if 2 reports are different.

macros/src/lib.rs

@@ -229,7 +229,7 @@ pub fn gen_hid_descriptor(args: TokenStream, input: TokenStream) -> TokenStream
     let (descriptor, fields) = output;
 
     let mut out = quote! {
-        #[derive(Debug, Clone, Copy)]
+        #[derive(Debug, Clone, Copy, Default, Eq, PartialEq)]
         #[repr(C, packed)]
         #decl
 

src/descriptor.rs

@@ -83,17 +83,6 @@ pub struct KeyboardReport {
     pub keycodes: [u8; 6],
 }
 
-impl KeyboardReport {
-    pub const fn default() -> Self {
-        Self {
-            modifier: 0,
-            reserved: 0,
-            leds: 0,
-            keycodes: [0u8; 6],
-        }
-    }
-}
-
 /// KeyboardUsage describes the key codes to be used in implementing a USB keyboard.
 ///
 /// The usage type of all key codes is Selectors, except for the modifier keys