Update required PHP version to 7.1.3

Signed-off-by: Yuriy Pikhtarev <iglix@me.com>

.gitignore

@@ -2,7 +2,6 @@
 .idea
 .php_cs.cache
 composer.phar
-composer.lock
 configs/local.php
 data/avatars
 data/torrent_files

README.md

@@ -28,8 +28,8 @@ and go from there. The documentation will be translated into english in the near
 
 * Apache / nginx
 * MySQL / MariaDB / Percona
-* PHP: 5.6 / 7.0 / 7.1
-* PHP Extensions: bcmath, intl, tidy (optional), xml
+* PHP: 7.1 / 7.2 / 7.3
+* PHP Extensions: bcmath, intl, tidy (optional), xml, xmlwriter
 
 ## Installation
 

composer.json

@@ -35,18 +35,20 @@
     "docs": "https://docs.torrentpier.com/"
   },
   "require": {
-    "php": "^5.6 || ^7.0",
-    "bugsnag/bugsnag": "^3.5",
-    "filp/whoops": "^2.1",
-    "gigablah/sphinxphp": "^2.0",
-    "google/recaptcha": "^1.1",
-    "longman/ip-tools": "^1.2",
-    "roave/security-advisories": "dev-master",
-    "rych/bencode": "^1.0",
-    "samdark/sitemap": "^2.0",
-    "swiftmailer/swiftmailer": "^5.4",
-    "symfony/dotenv": "^3.3",
-    "symfony/var-dumper": "^3.3"
+    "php": "^7.1.3",
+    "bugsnag/bugsnag": "3.13.0",
+    "filp/whoops": "^2.2.0",
+    "gigablah/sphinxphp": "2.0.8",
+    "google/recaptcha": "1.1.3",
+    "longman/ip-tools": "1.2.1",
+    "rych/bencode": "1.0.0",
+    "samdark/sitemap": "2.2.0",
+    "swiftmailer/swiftmailer": "6.0.2",
+    "symfony/dotenv": "4.1.0",
+    "symfony/var-dumper": "4.1.0"
+  },
+  "require-dev": {
+    "roave/security-advisories": "dev-master"
   },
   "autoload": {
     "psr-4": {

library/includes/init_bb.php

@@ -14,8 +14,8 @@ if (!defined('BB_ROOT')) {
 /**
  * Check PHP version
  */
-if (version_compare(PHP_VERSION, '5.6', '<')) {
-    die('TorrentPier requires PHP version 5.6+. Your PHP version ' . PHP_VERSION);
+if (PHP_VERSION_ID < 70103) {
+    die('TorrentPier requires PHP version 7.1.3+. Your PHP version ' . PHP_VERSION);
 }
 
 /**