update yii.md links (#606)

Author: Arhell

for/yii.md

@@ -49,7 +49,7 @@ modules:
 
 This module starts Yii application for a test case and provides additional helper methods to simplify testing. It has only `orm` and `email` parts in order to exclude methods needed for functional testing only.
 
-By accessing `$this->tester` class inside a test case you can use methods of [Yii2 module](http://codeception.com/docs/modules/Yii2). So if you have orm and email parts enabled so you can call methods belonging from these parts:
+By accessing `$this->tester` class inside a test case you can use methods of [Yii2 module](https://codeception.com/docs/modules/Yii2). So if you have orm and email parts enabled so you can call methods belonging from these parts:
 
 ```php
 <?php
@@ -79,11 +79,11 @@ $this->tester->haveFixtures([
 $this->tester->grabFixture('user', 0);
 ```
 
-If `Yii2` module is enabled you can safely call `Yii::$app` inside a test, as application is initialized and cleaned up after a test. If you want to add your helper methods or custom assertions for your test case you should not extend `Codeception\Test\Unit` but write your own separate [Helper class](http://codeception.com/docs/06-ModulesAndHelpers#Helpers).
+If `Yii2` module is enabled you can safely call `Yii::$app` inside a test, as application is initialized and cleaned up after a test. If you want to add your helper methods or custom assertions for your test case you should not extend `Codeception\Test\Unit` but write your own separate [Helper class](https://codeception.com/docs/06-ModulesAndHelpers#Helpers).
 
 <div class="alert alert-warning">
   <span class="glyphicon glyphicon-info-sign" aria-hidden="true"></span>
-  Continue to <a href="http://codeception.com/docs/05-UnitTests">Unit Testing Guide &raquo;</a>
+  Continue to <a href="https://codeception.com/docs/05-UnitTests">Unit Testing Guide &raquo;</a>
 </div>
 
 
@@ -104,9 +104,9 @@ $I->see('Body cannot be blank');
 ```
 
 This way you not only test the ContactForm on a site but actual output of application that user sees.
-Codeception provides standard set of actions like `amOnPage`, `submitForm`, `see` for testing. Yii2 module provides special methods, like `amLoggedInAs` (for fast authentication), `haveRecord`, `seeRecord`, `seeEmailIsSent` and others. They all are listed in [module reference](http://codeception.com/docs/modules/Yii2).
+Codeception provides standard set of actions like `amOnPage`, `submitForm`, `see` for testing. Yii2 module provides special methods, like `amLoggedInAs` (for fast authentication), `haveRecord`, `seeRecord`, `seeEmailIsSent` and others. They all are listed in [module reference](https://codeception.com/docs/modules/Yii2).
 
-Functional tests should be written inside [Cest files](http://codeception.com/docs/07-AdvancedUsage#Cest-Classes), which is a scenario-driven test format of Codeception. You can easily create a new test by running:
+Functional tests should be written inside [Cest files](https://codeception.com/docs/07-AdvancedUsage#Cest-Classes), which is a scenario-driven test format of Codeception. You can easily create a new test by running:
 
 ```
 ./vendor/bin/codecept g:cest functional MyNewScenarioCest
@@ -115,7 +115,7 @@ Functional tests should be written inside [Cest files](http://codeception.com/do
 <div class="alert alert-warning">
   <span class="glyphicon glyphicon-info-sign" aria-hidden="true"></span>
   Functional tests are really powerful and simple. They are highly <strong>recommended to use</strong> for any Yii application.<br>
-  Continue to <a href="http://codeception.com/docs/04-FunctionalTests">Functional Testing Guide &raquo;</a>
+  Continue to <a href="https://codeception.com/docs/04-FunctionalTests">Functional Testing Guide &raquo;</a>
 </div>
 
 ### API Tests
@@ -145,7 +145,7 @@ Yii2 module actions like `amOnPage` or `see` should not be available for testing
 
 <div class="alert alert-warning">
   <span class="glyphicon glyphicon-info-sign" aria-hidden="true"></span>
-  Continue to <a href="http://codeception.com/docs/10-APITesting#REST-API">REST API Testing Guide &raquo;</a>.
+  Continue to <a href="https://codeception.com/docs/10-APITesting#REST-API">REST API Testing Guide &raquo;</a>.
 </div>
 
 ### Acceptance Tests
@@ -166,7 +166,7 @@ Then you will need to launch application server in test mode:
 ./tests/bin/yii serve
 ```
 
-and start a [Selenium Server](http://codeception.com/docs/modules/WebDriver#Local-Testing). For acceptance WebDriver module is used. Please check its reference to learn how to work with it. Unlike Yii2 module it does know nothing about your application, so if you want to use features of Yii like fixtures for acceptance testing, you should check that enable Yii2 module is enabled as well:
+and start a [Selenium Server](https://codeception.com/docs/modules/WebDriver#Local-Testing). For acceptance WebDriver module is used. Please check its reference to learn how to work with it. Unlike Yii2 module it does know nothing about your application, so if you want to use features of Yii like fixtures for acceptance testing, you should check that enable Yii2 module is enabled as well:
 
 ```yml
 # config at tests/acceptance.yml
@@ -191,7 +191,7 @@ Similar as for functional tests it is recommended to use Cest format for accepta
 
 <div class="alert alert-warning">
   <span class="glyphicon glyphicon-info-sign" aria-hidden="true"></span>
-  Continue to <a href="http://codeception.com/docs/03-AcceptanceTests">Acceptance Testing Guide &raquo;</a>
+  Continue to <a href="https://codeception.com/docs/03-AcceptanceTests">Acceptance Testing Guide &raquo;</a>
 </div>
 
 ## Yii Advanced
@@ -204,7 +204,7 @@ Tests also include namespaces for testcase classes and testers to avoid conflict
 
 <div class="alert alert-warning">
   <span class="glyphicon glyphicon-info-sign" aria-hidden="true"></span>
-  Learn more about <a href="http://codeception.com/docs/08-Customization#One-Runner-for-Multiple-Applications">testing multiple applications &raquo;</a>
+  Learn more about <a href="https://codeception.com/docs/08-Customization#One-Runner-for-Multiple-Applications">testing multiple applications &raquo;</a>
 </div>
 
 ## Manual Setup && Configuration