maintenance: dependabot (#170)

closes #168

Author: Greg Bowler

.github/dependabot.yml

@@ -1,11 +1,12 @@
 version: 2
 updates:
-- package-ecosystem: composer
-  directory: "/"
-  schedule:
-    interval: daily
-  open-pull-requests-limit: 10
-  ignore:
-  - dependency-name: phpstan/phpstan
-    versions:
-    - 0.12.70
+  - 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

@@ -10,8 +10,8 @@
 		"willdurand/negotiation": "v3.1.0"
 	},
 	"require-dev": {
-		"phpstan/phpstan": "v1.8.1",
-		"phpunit/phpunit": "v9.5.23"
+		"phpstan/phpstan": "^v1.8",
+		"phpunit/phpunit": "^v9.5"
 	},
 
 	"autoload": {