fixes to ignored files and added php requirements to composer

Author: cbschuld

.gitignore

@@ -1,3 +1,5 @@
 .idea
 vendor
 .phpunit.result.cache
+/phpunit.xml
+/composer.lock

composer.json

@@ -1,8 +1,12 @@
 {
     "name": "cbschuld/browser.php",
     "description": "A PHP Class to detect a user's Browser",
-    "keywords": ["browser", "user agent", "detection"],
-    "homepage": "http://chrisschuld.com/projects/browser-php-detecting-a-users-browser-from-php.html",
+    "keywords": [
+        "browser",
+        "user agent",
+        "detection"
+    ],
+    "homepage": "https://chrisschuld.com/projects/browser-php-detecting-a-users-browser-from-php/",
     "license": "MIT",
     "authors": [
         {
@@ -14,6 +18,9 @@
     "autoload": {
         "classmap": ["lib/Browser.php"]
     },
+    "require": {
+        "php": "^5.4"
+    },
     "extra": {
         "branch-alias": {
             "dev-master": "1.9.x-dev"
@@ -22,4 +29,4 @@
     "require-dev": {
         "phpunit/phpunit": "^8"
     }
-}
+}