Change all instances of networkId to chainId (#2313)

* abi-gen/test: recompile contract fixtures for 3.0

It seems this hadn't been done since the merge with the 3.0 branch.

* Sync `monorepo$ yarn test` exclusions to CI config

* sra-spec: correct typo

* contract-wrappers: TODO after coord.-server update

* utils: fix typo in comment

* Refactor networkId to chainId everywhere

* Update CHANGELOGs

python-packages/order_utils/stubs/web3/__init__.pyi

@@ -21,11 +21,14 @@ class Web3:
         version: str
         ...
 
-    class eth:
+    class Eth:
         @staticmethod
         def contract(address: str, abi: Dict) -> Contract: ...
+        chainId: int
         ...
 
+    eth: Eth
+
     class geth:
         class personal:
             @staticmethod