Use packagist instead of pear

composer.json-dist

@@ -3,10 +3,6 @@
     "description": "The Roundcube Webmail suite",
     "license": "GPL-3.0+",
     "repositories": [
-        {
-            "type": "pear",
-            "url": "https://pear.php.net/"
-        },
         {
             "type": "composer",
             "url": "https://plugins.roundcube.net/"
@@ -23,21 +19,21 @@
     "require": {
         "php": ">=5.4.0",
         "pear/pear-core-minimal": "~1.10.1",
-        "roundcube/plugin-installer": "~0.1.6",
-        "pear-pear.php.net/net_socket": "~1.0.12",
-        "pear-pear.php.net/auth_sasl": "~1.0.6",
-        "pear-pear.php.net/net_idna2": "~0.1.1",
-        "pear-pear.php.net/mail_mime": "~1.10.0",
-        "pear-pear.php.net/net_smtp": "~1.7.1",
-        "pear-pear.php.net/crypt_gpg": "~1.6.0",
+        "pear/net_socket": "~1.0.12",
+        "pear/auth_sasl": "~1.1.0",
+        "pear/net_idna2": "~0.2.0",
+        "pear/mail_mime": "~1.10.0",
+        "pear/net_smtp": "~1.7.1",
+        "pear/net_ldap2": "~2.2.0",
+        "pear/crypt_gpg": "~1.6.0",
         "roundcube/net_sieve": "~1.5.0",
+        "roundcube/plugin-installer": "~0.1.6",
         "endroid/qrcode": "~1.6.5"
     },
     "require-dev": {
         "phpunit/phpunit": "~5.7.15"
     },
     "suggest": {
-        "pear-pear.php.net/net_ldap2": "~2.2.0 required for connecting to LDAP address books",
         "kolab/Net_LDAP3": "dev-master required for connecting to LDAP address books"
     }
 }