[camelcase] add linting & enable strict null checks (#18846)

* [camelcase] add linting & enable strict null checks

* [camelcase] reintroduce namespace to support import * syntax to avoid a breaking change for users

types/camelcase/camelcase-tests.ts

@@ -1,4 +1,3 @@
-
 import camelCase = require('camelcase');
 
 camelCase('foo-bar');

types/camelcase/index.d.ts

@@ -1,9 +1,9 @@
-// Type definitions for camelcase
+// Type definitions for camelcase 4.1
 // Project: https://github.com/sindresorhus/camelcase
 // Definitions by: Sam Verschueren <https://github.com/samverschueren>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
+export = camelcase;
 
 declare function camelcase(...args: string[]): string;
-declare namespace camelcase { }
-export = camelcase;
+declare namespace camelcase {}

types/camelcase/tsconfig.json

@@ -6,7 +6,7 @@
         ],
         "noImplicitAny": true,
         "noImplicitThis": true,
-        "strictNullChecks": false,
+        "strictNullChecks": true,
         "baseUrl": "../",
         "typeRoots": [
             "../"
@@ -19,4 +19,4 @@
         "index.d.ts",
         "camelcase-tests.ts"
     ]
-}
+}

types/camelcase/tslint.json

@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }