Added typings for prosemirror-history 0.18.0

prosemirror-history/index.d.ts

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+// Type definitions for prosemirror-history 0.18.0
+// Project: https://github.com/ProseMirror/prosemirror-history
+// Definitions by: David Hahn <https://github.com/davidka>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+import { Plugin } from 'prosemirror-state'
+import { EditorState } from 'prosemirror-state'
+import { Transaction } from 'prosemirror-state'
+
+declare module "prosemirror-history" {
+  export function history(config?: { depth?: number, newGroupDelay: number, preserveItems?: boolean }): Plugin
+  export function undo(state: EditorState, dispatch?: (tr: Transaction) => void): boolean
+  export function redo(state: EditorState, dispatch?: (tr: Transaction) => void): boolean
+  export function undoDepth(state: EditorState): number
+  export function redoDepth(state: EditorState): number
+
+}

prosemirror-history/prosemirror-history-tests.ts

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+import * as history from 'prosemirror-history';
+import {EditorState} from 'prosemirror-state';
+
+let state = new EditorState();
+history.undo(state);

prosemirror-history/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6",
+            "dom"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "prosemirror-history-tests.ts"
+    ]
+}