Updated dependencies

Added phpcs back in, updated several dependencies, stubbed
v0.5.0 changelog section

Author: barnabywalters

README.md

@@ -356,6 +356,18 @@ Currently php-mf2 passes the majority of it’s own test case, and a good percen
 
 ### Changelog
 
+#### v0.5.0
+
+Breaking change: bumped minimum PHP version from 5.4 to 5.6 (#220)
+
+Other changes:
+
+* #195 Fix backcompat parsing for geo property
+* #182 Fix parsing for iframe.u-*\[src]
+* #214 parse an img element for src and alt
+* #206 Add optional ID for h-* elements
+* #198 reduce instances where photo is implied
+
 #### v0.4.6
 
 Bugfixes:

composer.json

@@ -18,8 +18,11 @@
        }
     },
     "require-dev": {
-        "phpunit/phpunit": "4.8.*",
-        "mf2/tests": "dev-master#e9e2b905821ba0a5b59dab1a8eaf40634ce9cd49"
+        "phpunit/phpunit": "^5.7",
+        "mf2/tests": "dev-master#e9e2b905821ba0a5b59dab1a8eaf40634ce9cd49",
+        "squizlabs/php_codesniffer": "^3.6.2",
+        "dealerdirect/phpcodesniffer-composer-installer": "^0.7",
+	    "phpcompatibility/php-compatibility": "^9.3"
     },
     "autoload": {
         "files": ["Mf2/Parser.php"]