chore(docs): change links to https if possible

README.md

@@ -1,4 +1,4 @@
-![sabre's logo](http://sabre.io/img/logo.png) sabre/dav
+![sabre's logo](https://sabre.io/img/logo.png) sabre/dav
 =======================================================
 
 Introduction
@@ -8,7 +8,7 @@ sabre/dav is the most popular WebDAV framework for PHP. Use it to create WebDAV,
 
 Full documentation can be found on the website:
 
-http://sabre.io/
+https://sabre.io/
 
 
 Build status
@@ -29,8 +29,8 @@ Build status
 Documentation
 -------------
 
-* [Introduction](http://sabre.io/dav/).
-* [Installation](http://sabre.io/dav/install/).
+* [Introduction](https://sabre.io/dav/).
+* [Installation](https://sabre.io/dav/install/).
 
 
 Made at fruux

composer.json

@@ -3,13 +3,13 @@
     "type": "library",
     "description": "WebDAV Framework for PHP",
     "keywords": ["Framework", "WebDAV", "CalDAV", "CardDAV", "iCalendar"],
-    "homepage": "http://sabre.io/",
+    "homepage": "https://sabre.io/",
     "license" : "BSD-3-Clause",
     "authors": [
         {
             "name": "Evert Pot",
             "email": "[email protected]",
-            "homepage" : "http://evertpot.com/",
+            "homepage" : "https://evertpot.com/",
             "role" : "Developer"
         }
     ],