fix(types): add missing index.d.ts referenced from package.json (#447)

Author: Thomaash

__snapshots__/package.test.js

@@ -6,6 +6,7 @@ exports['package exported files 1'] = {
     "        declarations/entry-esnext.d.ts",
     "        declarations/entry-peer.d.ts",
     "        declarations/entry-standalone.d.ts",
+    "        declarations/index.d.ts",
     "        dist/esm.js",
     "        dist/esm.js.map",
     "        dist/vis-graph3d.min.js",

declarations/index.d.ts

@@ -0,0 +1,22 @@
+// utils
+export * as util from "vis-util/esnext";
+
+// data
+export { DataSet } from "vis-data/esnext";
+export { DataView } from "vis-data/esnext";
+export { Queue } from "vis-data/esnext";
+
+// Graph3d
+export const Graph3d: any;
+export const graph3d: {
+  Camera: any;
+  Filter: any;
+  Point2d: any;
+  Point3d: any;
+  Slider: any;
+  StepNumber: any;
+};
+
+// bundled external libraries
+export const Hammer: typeof import("hammerjs");
+export const keycharm: any;