Merge pull request #25 from EugenGanshorn/master

composer.json cleanup, added php8, upgraded some other packages

Author: gregurco

composer.json

@@ -18,19 +18,19 @@
     ],
 
     "require": {
-        "php":                              ">=7.1",
+        "php":                              "^7.1|^8.0",
         "guzzlehttp/guzzle":                "^6.0",
-        "eightpoints/guzzle-bundle":        "^8.0.1",
-        "symfony/http-kernel":              "~4.0|~5.0",
-        "symfony/config":                   "~4.0|~5.0",
-        "symfony/dependency-injection":     "~4.0|~5.0",
-        "symfony/expression-language":      "~4.0|~5.0",
-        "sainsburys/guzzle-oauth2-plugin":  "^3.0.5"
+        "eightpoints/guzzle-bundle":        "^8.0",
+        "symfony/http-kernel":              "^4.0|^5.0|^6.0",
+        "symfony/config":                   "^4.0|^5.0|^6.0",
+        "symfony/dependency-injection":     "^4.0|^5.0|^6.0",
+        "symfony/expression-language":      "^4.0|^5.0|^6.0",
+        "sainsburys/guzzle-oauth2-plugin":  "^3.0"
     },
 
     "require-dev": {
-        "phpunit/phpunit":              "~7.5",
-        "php-coveralls/php-coveralls":  "~2.2"
+        "phpunit/phpunit":              "^9.5",
+        "php-coveralls/php-coveralls":  "^2.2"
     },
 
     "autoload": {