feat: upgrade CI (#2)

Author: bpolaszek

.travis.yml

@@ -5,6 +5,8 @@ language: php
 php:
   - 7.1
   - 7.2
+  - 7.3
+  - 7.4
 
 before_script:
   - travis_retry composer self-update
@@ -16,4 +18,4 @@ script:
   - ./vendor/bin/phpunit --coverage-clover build/logs/clover.xml
 
 after_script:
-  - php vendor/bin/coveralls -v
+  - php vendor/bin/php-coveralls -v

composer.json

@@ -16,11 +16,11 @@
         "php": ">=7.1"
     },
     "require-dev": {
+        "league/uri": "^5.0",
+        "php-coveralls/php-coveralls": "^2.4",
         "phpunit/phpunit": "^5.0|^6.0|^7.0",
         "squizlabs/php_codesniffer": "^3.0",
-        "satooshi/php-coveralls": "^2.0",
-        "symfony/var-dumper": "^3.3",
-        "league/uri": "^5.0"
+        "symfony/var-dumper": "^3.3"
     },
     "autoload": {
         "psr-4": {