chore: fix flow config

web3.js/.flowconfig

@@ -14,6 +14,3 @@ module.system.node.resolve_dirname=./src
 module.use_strict=true
 experimental.const_params=true
 include_warnings=true
-suppress_comment=\\(.\\|\n\\)*\\$FlowFixMe
-suppress_comment=\\(.\\|\n\\)*\\$FlowIssue
-suppress_comment=\\(.\\|\n\\)*\\$FlowIgnore

web3.js/test/cluster.test.js

@@ -3,7 +3,7 @@ import {clusterApiUrl} from '../src/util/cluster';
 
 test('invalid', () => {
   expect(() => {
-    // $FlowIgnore
+    // $FlowExpectedError
     clusterApiUrl('abc123');
   }).toThrow();
 });