Support PHP 7.0.

.travis.yml

@@ -1,6 +1,7 @@
 language: php
 
 php:
+  - "7.0"
   - "7.1"
 
 env:

composer.json

@@ -22,7 +22,7 @@
     "source": "https://github.com/netzmacht/contao-leaflet-maps"
   },
   "require": {
-    "php": ">=7.1",
+    "php": ">=7.0",
     "contao/core-bundle": "^4.4",
     "netzmacht/contao-leaflet-libraries": "^1.0",
     "netzmacht/php-javascript-builder": "^1.0",

src/Listener/Dca/LeafletDcaListener.php

@@ -56,7 +56,7 @@ class LeafletDcaListener
      *
      * @return void
      */
-    public function loadLanguageFile(): void
+    public function loadLanguageFile()
     {
         Controller::loadLanguageFile('leaflet');
     }

src/Listener/Dca/MarkerDcaListener.php

@@ -47,7 +47,7 @@ class MarkerDcaListener
      *
      * @return void
      */
-    public function initialize(): void
+    public function initialize()
     {
         Controller::loadLanguageFile('leaflet');
     }

src/Listener/LoadAssetsListener.php

@@ -69,7 +69,7 @@ class LoadAssetsListener
      *
      * @return void
      */
-    public function onGetJavascriptEvent(): void
+    public function onGetJavascriptEvent()
     {
         $this->assets->addJavascript(
             'bundles/netzmachtcontaoleaflet/js/contao-leaflet.js',
@@ -117,7 +117,7 @@ class LoadAssetsListener
      *
      * @return void
      */
-    protected function loadIconsLibraries($icon): void
+    protected function loadIconsLibraries($icon)
     {
         foreach ($icon::getRequiredLibraries() as $library) {
             if (!isset($this->libraries[$library])) {

src/Listener/RegisterLibrariesListener.php

@@ -56,7 +56,7 @@ final class RegisterLibrariesListener
      *
      * @return void
      */
-    public function onInitializeSystem(): void
+    public function onInitializeSystem()
     {
         foreach ($this->libraries as $name => $assets) {
             if (!empty($assets['css'])) {