HTTP/HTTPS mixed content errors #612 (#613)

* Configure TrustProxies middleware
* Add trusted proxies to deps
* Replace jquery request with axios request code
* Trust current user IP for forwarded headers
* Update dependencies
* Downgrade self-updater package for PHP 7.2

composer.json

@@ -21,10 +21,11 @@
         "anhskohbo/no-captcha": "^3.0",
         "appstract/laravel-opcache": "^2.0",
         "arrilot/laravel-widgets": "~3.13.0",
-        "codedge/laravel-selfupdater": "^2.5",
+        "codedge/laravel-selfupdater": "~2.5.1",
         "doctrine/dbal": "~2.9.2",
         "elcobvg/laravel-opcache": "~0.4",
         "facade/ignition": "^1.6",
+        "fideloper/proxy": "^4.3",
         "guzzlehttp/guzzle": "~6.3.3",
         "hashids/hashids": "^2.0.0",
         "igaster/laravel-theme": "^2.0",
@@ -43,6 +44,7 @@
         "nabeel/vacentral": "~2.0",
         "nwidart/laravel-modules": "^6.0",
         "php-units-of-measure/php-units-of-measure": "~2.1.0",
+        "phpvms/sample-module": "^1.0",
         "pragmarx/version": "0.2.*",
         "prettus/l5-repository": "~2.6.0",
         "santigarcor/laratrust": "~5.2.0",
@@ -54,8 +56,7 @@
         "theiconic/php-ga-measurement-protocol": "2.7.*",
         "tivie/php-os-detector": "~1.1.0",
         "webpatser/laravel-uuid": "~3.0",
-        "oomphinc/composer-installers-extender": "^1.1",
-        "phpvms/sample-module": "^1.0"
+        "oomphinc/composer-installers-extender": "^1.1"
     },
     "require-dev": {
         "barryvdh/laravel-debugbar": "^3.0",