Update tests for entrypoints

test/contracts/spend_test.aes

@@ -1,26 +1,26 @@
 
 contract SpendContract =
-  function withdraw : (int) => int
+  entrypoint withdraw : (int) => int
 
 contract SpendTest =
 
-  stateful function spend(to, amount) =
+  stateful entrypoint spend(to, amount) =
     let total = Contract.balance
     Chain.spend(to, amount)
     total - amount
 
-  stateful function withdraw(amount) : int =
+  stateful entrypoint withdraw(amount) : int =
     spend(Call.caller, amount)
 
-  stateful function withdraw_from(account, amount) =
+  stateful entrypoint withdraw_from(account, amount) =
     account.withdraw(amount)
     withdraw(amount)
 
-  stateful function spend_from(from, to, amount) =
+  stateful entrypoint spend_from(from, to, amount) =
     from.withdraw(amount)
     Chain.spend(to, amount)
     Chain.balance(to)
 
-  function get_balance() = Contract.balance
-  function get_balance_of(a) = Chain.balance(a)
+  entrypoint get_balance() = Contract.balance
+  entrypoint get_balance_of(a) = Chain.balance(a)