fix cairo compatibility

cairo/lack-of-error-message.cairo

@@ -1,6 +1,6 @@
 use starknet::ContractAddress;
 
-#[contract]
+#[starknet::contract]
 mod TestContract {
     fn test1() {
         let a = 1;

cairo/view-fn-mutable-state.cairo

@@ -1,10 +1,10 @@
-#[contract]
+#[starknet::contract]
 mod contract {
     struct Storage {}
 
     // ok: view-fn-mutable-state 
-    #[external]
-    fn get_variable(self: @ContractState) {}
+    // #[external]
+    // fn get_variable(self: @ContractState) {}
 
     // ruleid: view-fn-mutable-state 
     #[external]

cairo/view-fn-writes.cairo

@@ -1,26 +1,17 @@
-#[starknet::interface]
-trait ISimpleStorage<TContractState> {
-    fn set(ref self: TContractState, x: u128);
-    fn get(self: @TContractState) -> u128;
-}
-
 #[starknet::contract]
 mod SimpleStorage {
     #[storage]
     struct Storage {
         stored_data: u128
     }
 
-    #[abi(embed_v0)]
-    impl SimpleStorage of super::ISimpleStorage<ContractState> {
-        // ok: view-fn-writes
-        fn set(ref self: ContractState, x: u128) {
-            self.stored_data.write(x);
-        }
+    // ok: view-fn-writes
+    fn set(ref self: ContractState, x: u128) {
+        self.stored_data.write(x);
+    }
 
-        // ruleid: view-fn-writes
-        fn get(self: ContractState) -> u128 {
-            self.stored_data.write(123);
-        }
+    // ruleid: view-fn-writes
+    fn get(self: ContractState) -> u128 {
+        self.stored_data.write(123);
     }
 }

cairo/zero-division.cairo

@@ -1,6 +1,6 @@
 use starknet::ContractAddress;
 
-#[contract]
+#[starknet::contract]
 mod TestContract {
     fn test1(x: uint256) -> uint256 {
         // ruleid: zero-division