fix: grid snapshot types are correctly exported

.gitignore

@@ -9,3 +9,4 @@ examples/__examples.html
 .parcel-cache
 .docusaurus
 /docs/api
+react-virtuoso-0.0.0-development.tgz

src/component-interfaces/VirtuosoGrid.ts

@@ -1,4 +1,3 @@
-import { GridStateSnapshot } from '../gridSystem'
 import type {
   GridComponents,
   GridComputeItemKey,
@@ -10,6 +9,23 @@ import type {
 } from '../interfaces'
 import { LogLevel } from '../loggerSystem'
 
+export interface Gap {
+  row: number
+  column: number
+}
+
+export interface ElementDimensions {
+  width: number
+  height: number
+}
+
+export interface GridStateSnapshot {
+  viewport: ElementDimensions
+  item: ElementDimensions
+  gap: Gap
+  scrollTop: number
+}
+
 export interface VirtuosoGridProps<D, C = unknown> extends GridRootProps {
   /**
    * The total amount of items to be rendered.

src/gridSystem.ts

@@ -11,19 +11,10 @@ import { loggerSystem } from './loggerSystem'
 import { windowScrollerSystem } from './windowScrollerSystem'
 import { getInitialTopMostItemIndexNumber } from './initialTopMostItemIndexSystem'
 import { skipFrames } from './utils/skipFrames'
+import { ElementDimensions, Gap, GridStateSnapshot } from './component-interfaces/VirtuosoGrid'
 
 export type Data = unknown[] | null
 
-export interface Gap {
-  row: number
-  column: number
-}
-
-export interface ElementDimensions {
-  width: number
-  height: number
-}
-
 export interface GridLayout {
   top: number
   bottom: number
@@ -80,13 +71,6 @@ function dimensionComparator(prev: ElementDimensions, next: ElementDimensions) {
   return prev && prev.width === next.width && prev.height === next.height
 }
 
-export interface GridStateSnapshot {
-  viewport: ElementDimensions
-  item: ElementDimensions
-  gap: Gap
-  scrollTop: number
-}
-
 export const gridSystem = /*#__PURE__*/ u.system(
   ([
     { overscan, visibleRange, listBoundary },