React countup upgrade definitions up to version 4.3.3 (#42748)

* update react-countup to version 4.3.3

* lint fixes

* update version

Co-authored-by: Ezequiel Surijon <esurijon@medallia.com>

types/react-countup/index.d.ts

@@ -1,6 +1,7 @@
-// Type definitions for react-countup 4.0
+// Type definitions for react-countup 4.3
 // Project: https://react-countup.now.sh
 // Definitions by: Daniel Brodin <https://github.com/danielbrodin>
+//                 Ezequiel Surijon <https://github.com/esurijon>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.8
 
@@ -12,52 +13,165 @@ export = ReactCountUp;
 
 declare namespace ReactCountUp {
     interface RenderProps {
+        /**
+         * Ref to hook the countUp instance to
+         */
         countUpRef: React.RefObject<any>;
+        /**
+         * Pauses or resumes the transition
+         */
         pauseResume(): void;
+        /**
+         * Resets to initial value
+         */
         reset(): void;
+        /**
+         * Starts or restarts the transition
+         */
         start(): void;
+        /**
+         * Updates transition to the new end value (if given)
+         */
         update(newEnd?: number): void;
     }
 
     interface Props {
+        /**
+         * CSS class name of the span element.
+         * Note: This won't be applied when using CountUp with render props.
+         */
         className?: string;
+
+        /**
+         * Specifies decimal character.
+         * Default: .
+         */
         decimal?: string;
+
+        /**
+         * Amount of decimals to display.
+         * Default: 0
+         */
         decimals?: number;
+
+        /**
+         * Delay in seconds before starting the transition.
+         * Default: null
+         * Note: delay={0} will automatically start the count up.
+         */
         delay?: number;
+
+        /**
+         * Duration in seconds.
+         * Default: 2
+         */
         duration?: number;
+
+        /**
+         * Target value.
+         */
         end?: number;
+
+        /**
+         * Static text before the transitioning value.
+         */
         prefix?: string;
+
+        /**
+         * Forces count up transition on every component update.
+         * Default: false
+         */
         redraw?: boolean;
+
+        /**
+         * Save previously ended number to start every new animation from it.
+         * Default: false
+         */
+        preserveValue?: boolean;
+
+        /**
+         * Specifies character of thousands separator.
+         */
         separator?: string;
+
+        /**
+         * Initial value.
+         * Default: 0
+         */
         start?: number;
+
+        /**
+         * Use for start counter on mount for hook usage.
+         * Default: true
+         */
+        startOnMount?: boolean;
+
+        /**
+         * Static text after the transitioning value.
+         */
         suffix?: string;
+
+        /**
+         * Enables easing. Set to false for a linear transition.
+         * Default: true
+         */
         useEasing?: boolean;
+
+        /**
+         * Easing function. http://robertpenner.com/easing for more details.
+         * Default: easeInExpo
+         */
         easingFn?(t: number, b: number, c: number, d: number): void;
+
+        /**
+         * Function to customize the formatting of the number
+         */
         formattingFn?(value: number): string;
-        onComplete?(): void;
+
+        /**
+         * Callback function on transition end.
+         */
         onEnd?(providedFn: {
             pauseResume(): void;
             reset(): void;
             start(): void;
             update(): void;
         }): void;
+
+        /**
+         * Callback function on transition start.
+         */
         onStart?(providedFn: {
             pauseResume(): void;
             reset(): void;
             update(): void;
         }): void;
+
+        /**
+         * Callback function on pause or resume.
+         */
         onPauseResume?(): (
             providedFn: { reset(): void; start(): void; update(): void }
         ) => void;
+
+        /**
+         * Callback function on reset.
+         */
         onReset?(): (
             providedFn: { pauseResume(): void; start(): void; update(): void }
         ) => void;
+
+        /**
+         * Callback function on update.
+         */
         onUpdate?(providedFn: {
             pauseResume(): void;
             reset(): void;
             start(): void;
         }): void;
+
         style?: React.CSSProperties;
+
         children?(data: RenderProps): React.ReactElement;
     }
 }