Update CHANGELOG

Update README.md

Add support for php8 (#32)

* Add support for php8

This will enable php-speller to be installed with php8.
Also change the build on travis to add coverage for 7.4 and a new step on php8

* Remove getMessage from ExceptionInterface

Remove this message, as it is not needed since it is coming from `Throwable`. Since PHP8 there needs to be a return type given or the declaration would fail.

* Update CHANGELOG.md

Update CHANGELOG.md

Update CHANGELOG.md

Fix Aspell output parsing when the original words contains a colon (#25)

* Fix Aspell output parsing when the original words contains a colon (#24)

Rework process handling with symfony/process 5.0 (#23)

* Rework process handling with symfony/process 5.0

Also drop support for php7.1 and symfony/process below 4.0

* Cleanup code by standards

* Install english dictionary for functions tests

Merge pull request #21 from ibarrajo/patch-1

update symfony/process

Fix PHP error triggered by malformed HTML attributes (#20)

Fix/backward compatibility (#14)

* Add backwards php7.1 and symfony/process ^3.4 support
* Readd travis matrix build