v4.0.0-alpha5

Dropped php7.1 and 7.2 updated some packages. (#321)

* removed travis-ci and added github actions build status to readme

Signed-off-by: fenn-cs <fenn25.fn@gmail.com>

* added php 8 to ci, updated build name

Signed-off-by: fenn-cs <fenn25.fn@gmail.com>

* added alternate php versions

Signed-off-by: fenn-cs <fenn25.fn@gmail.com>

* dropped php7.0, php7.1, updated jms/serializer

Signed-off-by: fenn-cs <fenn25.fn@gmail.com>

v4.0.0-alpha4

update badge

v4.0.0-alpha3

removed travis-ci and added github actions build status to readme (#319)

Signed-off-by: fenn-cs <fenn25.fn@gmail.com>

v4.0.0-alpha2

Tag 4.0.0-alpha2