Migrate to new Context API #776
Description
Legacy context API is getting deprecated in "Strict Mode": https://reactjs.org/blog/2018/10/23/react-v-16-6.html#deprecations-in-strictmode
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Legacy context API is getting deprecated in "Strict Mode": https://reactjs.org/blog/2018/10/23/react-v-16-6.html#deprecations-in-strictmode