update to 1.3.0
open https://github.com/roundcube/roundcubemail/pull/5820 - PHP 7
add dependency on endroid/qrcode
raise dependency on Net_Socket 1.2.1
raise dependency on Auth_SASL 1.1.0
raise dependency on Net_IDNA2 0.2.0
raise dependency on Crypt_GPG 1.6.0
switch from roundcube/net_sieve to pear/Net_Sieve
switch to fedora/autoloader
add weak dependencies for optional components
use upstream complete archive for JS libraries
add a minimal %check for our autoloader