docs: Update MIGRATING.md for 0.10 and 1.0

MIGRATING.md

@@ -48,9 +48,55 @@ ignored in the further process.
 +}
 ```
 
+## 0.10.0 -> 1.0.0
+### Update deps to 2.0.0
+In Cargo.toml:
+```diff
+-cosmwasm-schema = "1.5.0"
+-cosmwasm-std = "1.5.0"
+-cw-multi-test = "0.20.0"
+-cw-storage-plus = "1.2.0"
+-cw-utils = "1.0.2"
+-cw2 = "1.1.2"
++cosmwasm-schema = "2.0.0"
++cosmwasm-std = "2.0.0"
++cw-multi-test = "2.0.0"
++cw-storage-plus = "2.0.0"
++cw-utils = "2.0.0"
++cw2 = "2.0.0"
+```
+
+In a multi-test code:
+```diff
+-let addr = Addr::unchecked("addr0001");
++use cw_multi_test::IntoBech32;
++let addr = "addr0001".into_bech32();
+let contract = code_id
+    .instantiate(vec![owner.to_owned()], false)
+    .with_label("Sublist contract")
+-    .call(addr)
++    .call(&addr)
+    .unwrap();
+```
+
+In the contract's code:
+```diff
+struct Contract<'a> {
+-    data: Item<'static, ContractData>,
+-    admins: Map<'static, &'a Addr, Empty>,
++    data: Item<ContractData>,
++    admins: Map<&'a Addr, Empty>,
+}
+```
+
 
 ## 0.9.3 -> 0.10.0
 
+__TODO: tkulik__
+
+
+
+
 ## Multitest proxy
 
 Since `0.10.0` Sylvia won't generate multitest Proxy types for the `Interface` macro call. Instead, all the methods from interfaces are directly implemented on the contract's multitest proxy.