Update Existential deposit (#198)

closes #197

runtime/src/lib.rs

@@ -208,7 +208,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
     spec_name: create_runtime_str!("atleta"),
     impl_name: create_runtime_str!("atleta"),
     authoring_version: 1,
-    spec_version: 6,
+    spec_version: 7,
     impl_version: 1,
     apis: RUNTIME_API_VERSIONS,
     transaction_version: 3,
@@ -382,7 +382,7 @@ impl pallet_timestamp::Config for Runtime {
 
 // balances
 parameter_types! {
-    pub const ExistentialDeposit: Balance = 30 * CENTS;
+    pub const ExistentialDeposit: Balance = 0;
     // For weight estimation, we assume that the most locks on an individual account will be 50.
     // This number may need to be adjusted in the future if this assumption no longer holds true.
     pub const MaxLocks: u32 = 50;