Update CI to PHP 8

.travis.yml

@@ -4,13 +4,12 @@ install:
   - composer install --ignore-platform-reqs
 
 php:
-  - 7.4
   - nightly
 
 script:
   - mkdir -p build/logs
   - php vendor/bin/phpunit -c build
 
-matrix:
-  allow_failures:
-    - php: nightly
+#matrix:
+#  allow_failures:
+#    - php: nightly

Jenkinsfile

@@ -10,18 +10,6 @@ pipeline {
 				sh 'php composer.phar install --ignore-platform-reqs'
 			}
  		}
-		stage('PHP 7.4') {
-			agent {
-				docker {
-					image 'php:7.4-cli-alpine'
-					args '-u root --privileged'
-				}
-			}
-			steps {
-				sh 'apk add --no-cache git'
-				sh 'php ./vendor/bin/phpunit --colors=never'
-			}
-		}
 		stage('PHP 8') {
 			agent {
 				docker {