lunr: Use export as namespace instead of global declarations + declare module (#20045)

types/lunr/index.d.ts

@@ -4,6 +4,9 @@
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.3
 
+export as namespace lunr;
+export = lunr;
+
 /**
  * lunr - http://lunrjs.com - A bit like Solr, but much smaller and not as bright
  * Copyright (C) 2014 Oliver Nightingale
@@ -999,7 +1002,3 @@ declare namespace lunr {
  * ```
  */
 declare function lunr(config: lunr.ConfigFunction): lunr.Index;
-
-declare module "lunr" {
-    export = lunr;
-}

types/lunr/lunr-tests.ts

@@ -22,12 +22,12 @@ function basic_test() {
 
 function pipeline_test() {
     const index = lunr(function() {
-        this.pipeline.add(function(token, tokenIndex, tokens) {
+        this.pipeline.add((token, tokenIndex, tokens) => {
             // text processing in here
             return token;
         });
 
-        this.pipeline.after(lunr.stopWordFilter, function(token, tokenIndex, tokens) {
+        this.pipeline.after(lunr.stopWordFilter, (token, tokenIndex, tokens) => {
             // text processing in here
             return token;
         });

types/lunr/tslint.json

@@ -1,9 +1 @@
-{
-  "extends": "dtslint/dt.json",
-  "rules": {
-      "ban-types": false,
-      "only-arrow-functions": [false],
-      "no-single-declare-module": false,
-      "no-unnecessary-qualifier": true
-  }
-}
+{ "extends": "dtslint/dt.json" }