Typescript added (exercism#16)

* Typescript added

* Change class name of typescript test

* Fixed typescript test

* Fixing identation in typescript test

Author: joshiraez

lib/languages/typescript.txt

@@ -0,0 +1,8 @@
+import
+/*
+/**
+*
+*/
+//
+from
+as

test/languages/typescript_test.rb

@@ -0,0 +1,49 @@
+require "test_helper"
+
+module SnippetExtractor
+  module Languages
+    class TypescriptTest < Minitest::Test
+      def test_full_example
+        code = <<~CODE
+
+          // Skipping imports
+          import * as example from 'example.js'
+          import *
+            as example
+            from 'example.js'
+
+          import { get_data, get_data2 } from 'example.js
+
+          /// Saying things over
+          /// multiple lines of code
+
+          /* Multiline comments */
+          /**
+           * Multiline comments 2
+           *
+           */
+
+          let numberRegexp = /^[0-9]+$/;
+          class ZipCodeValidator {
+            isAcceptable(s: string) {
+              return s.length === 5 && numberRegexp.test(s);
+            }
+          }
+          export = ZipCodeValidator;
+        CODE
+
+        expected = <<~CODE
+          let numberRegexp = /^[0-9]+$/;
+          class ZipCodeValidator {
+            isAcceptable(s: string) {
+              return s.length === 5 && numberRegexp.test(s);
+            }
+          }
+          export = ZipCodeValidator;
+        CODE
+
+        assert_equal expected, ExtractSnippet.(code, :typescript)
+      end
+    end
+  end
+end