chore: drop php <7 and solarium <4

Douglas Greenshields · Douglas Greenshields · commit 57eff0a0f65d · 2018-08-01T12:30:05.000+01:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # CHANGELOG
 
+## 0.3.0
+
+- Drop PHP <7.0 support.
+- Require Solarium 4.
+
 ## 0.2.0
 
 - Change plugin class name from Shieldo\AsyncPlugin to Shieldo\SolariumAsyncPlugin
diff --git a/composer.json b/composer.json
@@ -11,8 +11,8 @@
     }
   },
   "require": {
-    "php": ">=5.5",
-    "solarium/solarium": "^3.8",
+    "php": "^7",
+    "solarium/solarium": "^4",
     "php-http/httplug": "^1",
     "php-http/promise": "^1",
     "php-http/guzzle6-adapter": "^1",
