Remove dependency on PicoFeed

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "0076f6a8c01e655ba7d4be0948d8ea9e",
+    "content-hash": "100bd25a2613fac1b666b2103be0f3ce",
     "packages": [
         {
             "name": "aferrandini/phpqrcode",
@@ -501,59 +501,6 @@
             ],
             "time": "2017-12-01T13:59:36+00:00"
         },
-        {
-            "name": "miniflux/picofeed",
-            "version": "v0.1.34",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/miniflux/picoFeed.git",
-                "reference": "5c8a731d4e7a3589e562e4fdaa98bcb57fa8a2ea"
-            },
-            "dist": {
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-                "url": "https://api.github.com/repos/miniflux/picoFeed/zipball/5c8a731d4e7a3589e562e4fdaa98bcb57fa8a2ea",
-                "reference": "5c8a731d4e7a3589e562e4fdaa98bcb57fa8a2ea",
-                "shasum": ""
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-            "require": {
-                "ext-dom": "*",
-                "ext-iconv": "*",
-                "ext-libxml": "*",
-                "ext-simplexml": "*",
-                "ext-xml": "*",
-                "php": ">=5.3.0",
-                "zendframework/zendxml": "^1.0"
-            },
-            "require-dev": {
-                "phpdocumentor/reflection-docblock": "2.0.4",
-                "phpunit/phpunit": "4.8.26",
-                "symfony/yaml": "2.8.7"
-            },
-            "suggest": {
-                "ext-curl": "PicoFeed will use cURL if present"
-            },
-            "bin": [
-                "picofeed"
-            ],
-            "type": "library",
-            "autoload": {
-                "psr-0": {
-                    "PicoFeed": "lib/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Frédéric Guillot"
-                }
-            ],
-            "description": "Modern library to handle RSS/Atom feeds",
-            "homepage": "https://github.com/miniflux/picoFeed",
-            "time": "2017-06-12T00:22:06+00:00"
-        },
         {
             "name": "paragonie/random_compat",
             "version": "v2.0.11",
@@ -1041,16 +988,16 @@
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.6.0",
+            "version": "v1.7.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "2ec8b39c38cb16674bbf3fea2b6ce5bf117e1296"
+                "reference": "78be803ce01e55d3491c1397cf1c64beb9c1b63b"
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             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/2ec8b39c38cb16674bbf3fea2b6ce5bf117e1296",
-                "reference": "2ec8b39c38cb16674bbf3fea2b6ce5bf117e1296",
+                "url": "https://api.github.com/repos/symfony/polyfill-mbstring/zipball/78be803ce01e55d3491c1397cf1c64beb9c1b63b",
+                "reference": "78be803ce01e55d3491c1397cf1c64beb9c1b63b",
                 "shasum": ""
             },
             "require": {
@@ -1062,7 +1009,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.6-dev"
+                    "dev-master": "1.7-dev"
                 }
             },
             "autoload": {
@@ -1096,52 +1043,7 @@
                 "portable",
                 "shim"
             ],
-            "time": "2017-10-11T12:05:26+00:00"
-        },
-        {
-            "name": "zendframework/zendxml",
-            "version": "1.0.2",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/zendframework/ZendXml.git",
-                "reference": "7b64507bc35d841c9c5802d67f6f87ef8e1a58c9"
-            },
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-                "url": "https://api.github.com/repos/zendframework/ZendXml/zipball/7b64507bc35d841c9c5802d67f6f87ef8e1a58c9",
-                "reference": "7b64507bc35d841c9c5802d67f6f87ef8e1a58c9",
-                "shasum": ""
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-            "require": {
-                "php": "^5.3.3 || ^7.0"
-            },
-            "require-dev": {
-                "phpunit/phpunit": "^3.7 || ^4.0",
-                "squizlabs/php_codesniffer": "^1.5"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "1.0-dev"
-                }
-            },
-            "autoload": {
-                "psr-0": {
-                    "ZendXml\\": "library/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "BSD-3-Clause"
-            ],
-            "description": "Utility library for XML usage, best practices, and security in PHP",
-            "homepage": "http://packages.zendframework.com/",
-            "keywords": [
-                "security",
-                "xml",
-                "zf2"
-            ],
-            "time": "2016-02-04T21:02:08+00:00"
+            "time": "2018-01-30T19:27:44+00:00"
         }
     ],
     "packages-dev": [