assign isomorphic effect properly

should address issue #30.
also bumps to 0.7.0-alpha.1 for pushing to NPM

Author: rob2d

package.json

@@ -1,6 +1,6 @@
 {
   "name": "use-viewport-sizes",
-  "version": "0.7.0-alpha.0",
+  "version": "0.7.0-alpha.1",
   "description": "a tiny React hook which allows you to track visible window viewport size in your components w/ an optional debounce or custom memo function for updates for optimal rendering.",
   "main": "./build/index.js",
   "types": "./build/index.d.ts",

src/index.js

@@ -3,8 +3,7 @@ import {
     useMemo, 
     useCallback, 
     useRef, 
-    useLayoutEffect, 
-    useEffect, 
+    useLayoutEffect
 } from 'react';
 
 function getVpWidth() {
@@ -24,9 +23,8 @@ function getVpHeight() {
 
 // Avoid useLayoutEffect warning during SSR
 // https://usehooks-ts.com/react-hook/use-isomorphic-layout-effect
-function useIsomorphicLayoutEffect() {
-    typeof window !== 'undefined' ? useLayoutEffect : useEffect;
-}
+export const useIsomorphicLayoutEffect =
+  typeof window !== 'undefined' ? useLayoutEffect : () => {};
 
 // =============== //
 //  Shared State   //