Updated the README (PHP-FFMpeg#805)

Removed a non-valid link to Windows build and added a link to the FFMPEG download page were all executables can be found.

Added PHP8 support

Merge pull request PHP-FFMpeg#700 from CaliforniaMountainSnake/master

ComplexMedia, -filter_complex and -map features

Merge pull request PHP-FFMpeg#703 from iljalukin/master

Added initial parameters

Merge pull request PHP-FFMpeg#385 from WyriHaximus/patch-1

Target evenement 3.0 a long side 2.0 and 1.0

Adds Symfony 4 support (PHP-FFMpeg#559)

alchemy/binary-driver 2 added support for Symfony4.

Clip using input seek (PHP-FFMpeg#543)

Making video clip by input seeking

Merge pull request PHP-FFMpeg#485 from igorkosteski/master

Fix Clipping video transcoding progress not correct PHP-FFMpeg#2

Merge pull request PHP-FFMpeg#484 from igorkosteski/master

Fix Clipping video transcoding progress not correct

Merge pull request PHP-FFMpeg#437 from iganev/master

Added color option to waveform generation