PHP8 updates (#4)

Author: zloyuser

.gitattributes

@@ -0,0 +1,13 @@
+.github                  export-ignore
+.gitattributes           export-ignore
+.gitignore               export-ignore
+CONDUCT.md               export-ignore
+CONTRIBUTING.md          export-ignore
+ISSUE_TEMPLATE.md        export-ignore
+LICENSE.md               export-ignore
+PULL_REQUEST_TEMPLATE.md export-ignore
+README.md                export-ignore
+tests                    export-ignore
+benchmarks               export-ignore
+phpunit.xml              export-ignore
+phpbench.json            export-ignore

.gitignore

@@ -1,4 +1,5 @@
 .phpunit.result.cache
+composer.lock
 /.vscode
 /.idea
 /vendor

composer.json

@@ -16,11 +16,11 @@
         }
     ],
     "require": {
-        "php": "^7.1"
+        "php": "^7.1 || ^8.0"
     },
     "require-dev": {
-        "phpbench/phpbench": "^0.16",
-        "phpunit/phpunit": "^8.0"
+        "phpbench/phpbench": "^0.17",
+        "phpunit/phpunit": "^9.0"
     },
     "suggest": {
         "ext-buffer": "C extension to speed up pack/unpack binary data"