message: Added `neg` to "lib.dyon"
diff: @@ -235,6 +235,12 @@ fn norm(v: vec4) -> f64 { ... }
  /// Logical NOT.
  fn not(b: bool) -> bool { ... }
  +/// Negation.
  +fn neg(v: any) -> any { ... }
  + (f64) -> f64
  + (vec4) -> vec4
  + (mat4) -> mat4
  +
  /// Returns x component of 4D vector.
  fn x(v: vec4) -> f64 { ... }
  