Upgrade youtube-dl to 2021.04.01 (fixes #349)

composer.json

@@ -36,7 +36,7 @@
     "symfony/translation": "^4.0",
     "symfony/yaml": "^4.0",
     "webfontkit/open-sans": "^1.0",
-    "ytdl-org/youtube-dl": "^2020.11",
+    "ytdl-org/youtube-dl": "^2021.04",
     "zonuexe/http-accept-language": "^0.4.1"
   },
   "require-dev": {
@@ -90,10 +90,10 @@
       "type": "package",
       "package": {
         "name": "ytdl-org/youtube-dl",
-        "version": "2020.11.12",
+        "version": "2021.04.01",
         "dist": {
           "type": "zip",
-          "url": "https://github.com/ytdl-org/youtube-dl/archive/2020.11.12.zip"
+          "url": "https://github.com/ytdl-org/youtube-dl/archive/2021.04.01.zip"
         }
       }
     }

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "0a9125b1ada00d075fb697f43816a054",
+    "content-hash": "93cbba477de92eb8ec3d913b8cd83c82",
     "packages": [
         {
             "name": "aura/session",
@@ -2433,10 +2433,10 @@
         },
         {
             "name": "ytdl-org/youtube-dl",
-            "version": "2020.11.12",
+            "version": "2021.04.01",
             "dist": {
                 "type": "zip",
-                "url": "https://github.com/ytdl-org/youtube-dl/archive/2020.11.12.zip"
+                "url": "https://github.com/ytdl-org/youtube-dl/archive/2021.04.01.zip"
             },
             "type": "library"
         },
@@ -7132,6 +7132,5 @@
     "platform-dev": [],
     "platform-overrides": {
         "php": "7.3.11"
-    },
-    "plugin-api-version": "1.1.0"
+    }
 }