Scale trait and move to u32 blocknumbers (#3357)

* Scale trait and move to u32 blocknumbers.

* Fixes

* Cleanups

* Update node/runtime/src/lib.rs

Co-Authored-By: Bastian Köcher <bkchr@users.noreply.github.com>

* Fix up some of the factory stuff.

* Update core/sr-primitives/src/traits.rs

Co-Authored-By: Shawn Tabrizi <shawntabrizi@gmail.com>

* Move Nonce/Index to u32 (#3361)

* Force a non-borked version of upstream crate

* Line lengths and runtime version bump

substrate/node-template/runtime/src/lib.rs

@@ -48,10 +48,10 @@ pub type AccountSignature = sr25519::Signature;
 pub type Hash = primitives::H256;
 
 /// Index of a block number in the chain.
-pub type BlockNumber = u64;
+pub type BlockNumber = u32;
 
 /// Index of an account's extrinsic in the chain.
-pub type Nonce = u64;
+pub type Nonce = u32;
 
 /// Balance type for the node.
 pub type Balance = u128;