Reserve function name (#2609)

* reserve function name

* bumpd impl version

* Revert "bumpd impl version"

This reverts commit 03a23e308312d857bdfd3c90ff564b4b11347530.

* add test

* update test

* update lock

* Fix test on stable

substrate/srml/support/test/src/lib.rs

@@ -16,3 +16,9 @@
 
 //! Test crate for srml_support. Allow to make use of `srml_support::decl_storage`.
 //! See tests directory.
+
+#[test]
+fn reserved_keyword() {
+    let t = trybuild::TestCases::new();
+    t.compile_fail("tests/reserved_keyword/*.rs");
+}