make the range more inclusive

Author: dmoka

pallets/omnipool/src/tests/slip_fee_invariants.rs

@@ -6,7 +6,7 @@ use proptest::prelude::*;
 pub const ONE: Balance = 1_000_000_000_000;
 
 // Starting from 1m units as tiny pools push the slip-fee inversion past its discriminant threshold and the math returns Overflow.
-const BALANCE_RANGE: (Balance, Balance) = (1_000_000 * ONE, 10_000_000 * ONE);
+const BALANCE_RANGE: (Balance, Balance) = (500_000 * ONE, 10_000_000 * ONE);
 
 fn asset_reserve() -> impl Strategy<Value = Balance> {
 	BALANCE_RANGE.0..BALANCE_RANGE.1