Add PHP 7.4 support (#464)

* Add PHP 7.4 to build matrix

* DB fix

* YAML parser fix in test data

* Show versions

* Package updates

* Track used ICAOs

* 7.4 METAR parsing fix

* METAR parser fix

* Formatting

* Add meters to response units

* Call instance for unit conversion

* Return value

* Catch exception for unknown quantity

* Comment fix

* Formatting

* METAR parsing fixes on PHP 7.4

* Package updates

* More random airport ID

* More random airport ID

* Properly disable toolbar

* Semver written out to version file

* Use dev as default identifier

app/Providers/AppServiceProvider.php

@@ -74,6 +74,12 @@ class AppServiceProvider extends ServiceProvider
                 /* @noinspection PhpFullyQualifiedNameUsageInspection */
                 $this->app->register(\Barryvdh\LaravelIdeHelper\IdeHelperServiceProvider::class);
             }
+
+            if (config('app.debug_toolbar') === true) {
+                app('debugbar')->enable();
+            } else {
+                app('debugbar')->disable();
+            }
         }
     }
 }