Added typings for network-interfaces (#25027)

* Added typings for network-interfaces

* Added typings for network-interfaces

* Corrected build errors

types/network-interfaces/index.d.ts

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+// Type definitions for network-interfaces 1.1
+// Project: https://github.com/Wizcorp/network-interfaces#readme
+// Definitions by: Anders Westberg <https://github.com/anderswestberg>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+export function toIp(interfaceName: string, options: {}): string;
+export function toIps(interfaceName: string, options: {}): string[];
+export function fromIp(ip: string, options: {}): string;
+export function getInterface(options: {}): string;
+export function getInterfaces(options: {}): string[];

types/network-interfaces/network-interfaces-tests.ts

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+/// <reference types="node" />
+import * as ni from "network-interfaces";
+import * as os from "os";
+
+const options = {
+    internal: false, // boolean: only acknowledge internal or external addresses (undefined: both)
+    ipVersion: 4     // integer (4 or 6): only acknowledge addresses of this IP address family (undefined: both)
+};
+
+function test() {
+    try {
+        const ifcName = os.platform() !== "win32" ? "eth0" : "Ethernet";
+        const ip = ni.toIp(ifcName, options);
+        const ipList = ni.toIps(ifcName, options);
+        let ifc = ni.getInterface(options);
+        const ifcList = ni.getInterfaces(ifcName);
+        ifc = ni.fromIp(ip, options);
+    } catch (e) {
+    }
+}
+
+test();

types/network-interfaces/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",
+        "network-interfaces-tests.ts"
+    ]
+}

types/network-interfaces/tslint.json

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