Enforce strict types in PHP

Signed-off-by: Georg Ehrke <developer@georgehrke.com>

appinfo/app.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * Calendar App
  *

appinfo/routes.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * Calendar App
  *

lib/AppInfo/Application.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * Calendar App
  *

lib/Controller/ContactController.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * Calendar App
  *

lib/Controller/EmailController.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * @author Thomas Citharel
  * @author Georg Ehrke

lib/Controller/PublicViewController.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * Calendar App
  *

lib/Controller/SettingsController.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * Calendar App
  *

lib/Controller/ViewController.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * Calendar App
  *

lib/RepairSteps/CurrentViewNameRepairStep.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * Calendar App
  *

tests/php/unit/Controller/ContactControllerTest.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * Calendar App
  *

tests/php/unit/Controller/EmailControllerTest.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * Calendar App
  *

tests/php/unit/Controller/PublicViewControllerTest.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * Calendar App
  *

tests/php/unit/Controller/SettingsControllerTest.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * Calendar App
  *

tests/php/unit/Controller/ViewControllerTest.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * Calendar App
  *

tests/php/unit/RepairSteps/CurrentViewNameRepairStepTest.php

@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * Calendar App
  *