Adicionado teste no PHP 8;Atualizado dependências

Author: Tagliatti

.travis.yml

@@ -1,9 +1,9 @@
 language: php
 
 php:
-  - 7.2
   - 7.3
   - 7.4
+  - 8.0
 
 before_script:
   - composer self-update
@@ -14,4 +14,4 @@ script:
   - composer test
 
 after_success:
-  - php vendor/bin/php-coveralls --verbose
+  - php vendor/bin/php-coveralls --verbose

composer.json

@@ -9,13 +9,13 @@
     }
   ],
   "require": {
-    "php": "^7.2",
+    "php": ">=7.2",
     "thiagocfn/inscricaoestadual": "^1.1"
   },
   "require-dev": {
-    "phpunit/phpunit": "^8.4",
+    "phpunit/phpunit": "^8.4|^9.4",
     "orchestra/testbench": "^4.0",
-    "symplify/changelog-linker": "^6.1",
+    "symplify/changelog-linker": "^8.3",
     "php-coveralls/php-coveralls": "^2.2",
     "squizlabs/php_codesniffer": "*",
     "phpstan/phpstan": "^0.12.5"