Add contract migration to dev (#234)

### Description
<!-- Describe what change this PR is implementing -->

Adds contract migration to take the contracts pallet into version 9

### Types of Changes
<!--- What types of changes does your code introduce? -->
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Dependency upgrade (A change in substrate or any 3rd party crate
version)

### Migrations and Hooks
<!--- Check the following box with an x if the following applies: -->
- [x] This change requires a runtime migration.
- [ ] Modifies `on_initialize`
- [ ] Modifies `on_finalize`

### Checklist
<!--- All boxes need to be checked. Follow this checklist before
requiring PR review -->
- [ ] Change has been tested locally.
- [ ] Change adds / updates tests.
- [ ] Changelog doc updated.

runtime/cere-dev/src/lib.rs

@@ -130,7 +130,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	// and set impl_version to 0. If only runtime
 	// implementation changes and behavior does not, then leave spec_version as
 	// is and increment impl_version.
-	spec_version: 48600,
+	spec_version: 48601,
 	impl_version: 0,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 11,
@@ -1475,13 +1475,7 @@ parameter_types! {
 	pub DummyPalletAccountId: AccountId = DummyPalletId::get().into_account_truncating();
 }
 /// Runtime migrations
-type Migrations = (
-	pallet_balances::migration::ResetInactive<Runtime>,
-	// We need to apply this migration again, because `ResetInactive` resets the state again.
-	pallet_balances::migration::MigrateToTrackInactive<Runtime, DummyPalletAccountId>,
-	pallet_scheduler::migration::v4::CleanupAgendas<Runtime>,
-	pallet_staking::migrations::v13::MigrateToV13<Runtime>,
-);
+type Migrations = (pallet_contracts::Migration<Runtime>,);
 
 /// Executive: handles dispatch to the various modules.
 pub type Executive = frame_executive::Executive<