Vendor dependencies for 0.3.0 release

vendor/derive_more/tests/add.rs

@@ -0,0 +1,24 @@
+#![cfg_attr(not(feature = "std"), no_std)]
+#![allow(dead_code)] // some code is tested for type checking only
+
+use derive_more::Add;
+
+#[derive(Add)]
+struct MyInts(i32, i32);
+
+#[derive(Add)]
+struct Point2D {
+    x: i32,
+    y: i32,
+}
+
+#[derive(Add)]
+enum MixedInts {
+    SmallInt(i32),
+    BigInt(i64),
+    TwoSmallInts(i32, i32),
+    NamedSmallInts { x: i32, y: i32 },
+    UnsignedOne(u32),
+    UnsignedTwo(u32),
+    Unit,
+}