Enable react/prop-types eslint rule

Author: josiasds

client/.eslintrc

@@ -40,7 +40,7 @@ rules:
   react/no-did-update-set-state: 0
   react/no-multi-comp: 2
   react/no-unknown-property: 2
-  react/prop-types: 0
+  react/prop-types: 1
   react/react-in-jsx-scope: 2
   react/require-extension: [1, { extensions: [.js, .jsx] }]
   react/self-closing-comp: 2