Add type definitions for "koa-log" package

types/koa-log/index.d.ts

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+// Type definitions for koa-log 2.1
+// Project: https://github.com/vicanso/koa-log#readme
+// Definitions by: Uladzimir Havenchyk <https://github.com/havenchyk>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.3
+
+import * as Koa from 'koa';
+
+declare function koaLog(type: string): Koa.Middleware;
+
+declare namespace koaLog {
+    namespace morgan {
+        function cookie(ctx: Koa.BaseContext, key: string): string;
+
+        function date(ctx: Koa.BaseContext, format: string): string;
+
+        function format(name: string): string;
+
+        function length(ctx: Koa.BaseContext): number | undefined;
+
+        function method(ctx: Koa.BaseContext): string;
+
+        function referrer(ctx: Koa.BaseContext): string;
+
+        function status(ctx: Koa.BaseContext): number;
+
+        function token(name: string, fn: (ctx: Koa.BaseContext) => string): void;
+
+        function url(ctx: Koa.BaseContext): string;
+    }
+}
+
+export = koaLog;

types/koa-log/koa-log-tests.ts

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+import Koa = require('koa');
+import koaLogger = require('koa-log');
+
+koaLogger.morgan.token('request-body', (ctx: Koa.BaseContext) => JSON.stringify(ctx.request.body));
+koaLogger.morgan.token('response-body', (ctx: Koa.BaseContext) => JSON.stringify(ctx.body));
+
+const app = new Koa();
+app.use(
+    koaLogger(':status :method :url took :response-time ms :request-body :response-body')
+);

types/koa-log/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-log-tests.ts"
+    ]
+}

types/koa-log/tslint.json

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