Add typedef for react.createContext

src/additional-typedefs/react-createcontext.d.ts

@@ -0,0 +1,17 @@
+import * as React from "react";
+
+declare module "react" {
+    type Provider<T> = React.ComponentType<{
+        value: T;
+        children?: ReactNode;
+    }>;
+    type Consumer<T> = ComponentType<{
+        children: (value: T) => ReactNode;
+        unstable_observedBits?: number;
+    }>;
+    interface Context<T> {
+        Provider: Provider<T>;
+        Consumer: Consumer<T>;
+    }
+    function createContext<T>(defaultValue: T, calculateChangedBits?: (prev: T, next: T) => number): Context<T>;
+}