Set blocktime to 12s (#92)

Co-authored-by: echevrier <[email protected]>

Author: echevrier

runtime/src/lib.rs

@@ -155,7 +155,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 /// up by `pallet_aura` to implement `fn slot_duration()`.
 ///
 /// Change this to adjust the block time.
-pub const MILLISECS_PER_BLOCK: u64 = 6000;
+pub const MILLISECS_PER_BLOCK: u64 = 12000;
 
 // NOTE: Currently it is not possible to change the slot duration after the chain has started.
 //       Attempting to do so will brick block production.