Upgrade to Flow v0.74.0

Reviewed By: panagosg7

Differential Revision: D8322344

fbshipit-source-id: 1208528009785f7f797201777287af525d0a9ca1

Author: Maël Nison

templates/HelloWorld/_flowconfig

@@ -51,4 +51,4 @@ suppress_comment=\\(.\\|\n\\)*\\$FlowFixedInNextDeploy
 suppress_comment=\\(.\\|\n\\)*\\$FlowExpectedError
 
 [version]
-^0.73.0
+^0.74.0