again allow version 2.3 of Symfony components

.travis.yml

@@ -8,7 +8,7 @@ php:
 #  - hhvm
 
 env:
-  - SYMFONY_VERSION=2.6.*
+  - SYMFONY_VERSION=2.3.*
   - SYMFONY_VERSION=2.7.*
 #  - SYMFONY_VERSION=dev-master
 
@@ -22,3 +22,17 @@ after_script:
   - wget https://scrutinizer-ci.com/ocular.phar
   - php ocular.phar code-coverage:upload --format=php-clover coverage.clover
 
+matrix:
+#  allow_failures:
+#    - env: SYMFONY_VERSION=dev-master
+#    - php: hhvm
+  exclude:
+#    - env: SYMFONY_VERSION=dev-master
+#      php: 5.3
+#    - env: SYMFONY_VERSION=dev-master
+#      php: 5.4
+    - env: SYMFONY_VERSION=2.3.*
+      php: 5.6
+    - env: SYMFONY_VERSION=2.3.*
+      php: 7.0
+

CHANGELOG.md

@@ -6,8 +6,6 @@
 - new methods `HtmlPage::minify()` and `HtmlPage::indent()` for compressing or nicely indenting the HTML document. These
   functions rely on the package `wa72/html-pretty-min` that is *suggested* in composer.json.
 
-- minimum required version of Symfony components is now 2.6
-
 - sadly, HtmlPageDom is not compatible to the upcoming Symfony versions 2.8 and 3.0. Making it compatible requires
   major refactoring. I will do it as soon I have some time for it.
 

composer.json

@@ -14,11 +14,11 @@
     ],
     "require":{
         "php":">=5.4.0",
-        "symfony/dom-crawler":">=2.6,<2.8",
-        "symfony/css-selector":">=2.6,<2.8"
+        "symfony/dom-crawler":">=2.3,<2.8",
+        "symfony/css-selector":">=2.3,<2.8"
     },
     "require-dev": {
-        "wa72/html-pretty-min": "^0.1.1"
+        "wa72/html-pretty-min": "^0.1.2"
     },
     "suggest": {
         "wa72/html-pretty-min": "Minify or indent HTML documents"