feat: expose forceUpdate method

Author: FezVrasta

README.md

@@ -94,6 +94,7 @@ children: ({|
   isReferenceHidden: ?boolean,
   hasPopperEscaped: ?boolean,
   update: () => void,
+  forceUpdate: () => void,
   arrowProps: {
     ref: (?HTMLElement) => void,
     style: { [string]: string | number },

src/Popper.js

@@ -249,6 +249,7 @@ export class InnerPopper extends React.Component<PopperProps, PopperState> {
       isReferenceHidden,
       hasPopperEscaped,
       update: this.update,
+      forceUpdate: this.popperInstance ? this.popperInstance.forceUpdate : null,
       arrowProps: {
         ref: this.setArrowNode,
         style: this.getArrowStyle(),