Merge pull request #28478 from danwbyrne/koa-convert

adds typings for the 'koa-convert' package

types/koa-convert/index.d.ts

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+// Type definitions for koa-convert 1.2
+// Project: https://github.com/koajs/convert
+// Definitions by: Daniel Byrne <https://github.com/danwbyrne>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.3
+
+import { Context, Middleware } from "koa";
+
+declare function convert(
+    mw: (context: Context, next: () => void) => Generator
+): Middleware;
+
+export = convert;

types/koa-convert/koa-convert-tests.ts

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+import convert = require('koa-convert');
+import Koa = require('koa');
+
+const app = new Koa();
+
+app.use(modernMiddleware);
+
+app.use(convert(legacyMiddleware));
+
+function * legacyMiddleware(next: any) {
+  yield next;
+}
+
+function modernMiddleware(ctx: Koa.Context, next: any) {
+  return next().then(() => {});
+}

types/koa-convert/tsconfig.json

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

types/koa-convert/tslint.json

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+{
+  "extends": "dtslint/dt.json"
+}