Update mustache templates

Author: john-98point6

src/main/resources/mustache/typescript-fetch/api_test.mustache

@@ -0,0 +1,26 @@
+{{>licenseInfo}}
+
+import * as api from "./api"
+
+{{#apiInfo}}
+{{#apis}}
+{{#operations}}
+describe("{{classname}}", () => {
+  let instance: api.{{classname}}
+  beforeEach(function() {
+    instance = new api.{{classname}}()
+  });
+
+{{#operation}}
+  test("{{operationId}}", () => {
+    {{#allParams}}
+    const {{{paramName}}}: {{^isPrimitiveType}}api.{{/isPrimitiveType}}{{{dataType}}} = {{#example}}{{#isString}}"{{{example}}}"{{/isString}}{{^isString}}{{{example}}}{{/isString}}{{/example}}{{^example}}undefined{{/example}}
+    {{/allParams}}
+    expect(instance.{{operationId}}({{#allParams}}{{{paramName}}}, {{/allParams}}{})).toBe(null)
+  })
+{{/operation}}
+})
+
+{{/operations}}
+{{/apis}}
+{{/apiInfo}}

src/main/resources/mustache/typescript-fetch/licenseInfo.mustache

@@ -5,7 +5,7 @@
  * {{#version}}OpenAPI spec version: {{{version}}}{{/version}}
  * {{#infoEmail}}Contact: {{{infoEmail}}}{{/infoEmail}}
  *
- * NOTE: This class is auto generated by the swagger code generator program.
+ * NOTE: This file is auto generated by the swagger code generator program.
  * https://github.com/swagger-api/swagger-codegen.git
- * Do not edit the class manually.
+ * Do not edit the file manually.
  */

src/main/resources/mustache/typescript-fetch/package.mustache

@@ -20,8 +20,10 @@
     "portable-fetch": "^3.0.0"
   },
   "devDependencies": {
-    "@types/node": "^8.0.9",
-    "typescript": "^2.0"
+    "@types/jest": "^25.2.1",
+    "@types/node": "^13.13.0",
+    "jest": "^25.4.0",
+    "typescript": "^3.8.3"
   }{{#npmRepository}},{{/npmRepository}}
 {{#npmRepository}}
   "publishConfig":{