maintenance: dependabot (#17)

closes #16

.github/dependabot.yml

@@ -0,0 +1,12 @@
+version: 2
+updates:
+- package-ecosystem: composer
+  directory: "/"
+  schedule:
+    interval: daily
+  open-pull-requests-limit: 10
+  ignore:
+  - dependency-name: phpunit/phpunit
+    update-types: ["version-update:semver-patch"]
+  - dependency-name: phpstan/phpstan
+    update-types: ["version-update:semver-patch"]

composer.json

@@ -8,11 +8,11 @@
 
 	"require": {
 		"php": ">=7.4",
-		"phpgt/cli": "*"
+		"phpgt/cli": "^v1.3"
 	},
 	"require-dev": {
-		"phpstan/phpstan": "v1.8.0",
-		"phpunit/phpunit": "v9.5.21"
+		"phpstan/phpstan": "^v1.8",
+		"phpunit/phpunit": "^v9.5"
 	},
 
 	"autoload": {