Changes scrutinizer runs to 1 from 3

Author: coconutcraig

.scrutinizer.yml

@@ -20,4 +20,4 @@ checks:
 tools:
     external_code_coverage:
         timeout: 600
-        runs: 3
+        runs: 1

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 ### Changed
 - Removes hhvm from travis.yml file [`bfa3c1739e`](https://github.com/coconutcraig/laravel-postmark/commit/bfa3c1739e) 
+- Changes scrutinizer runs to 1 from 3 [`b004ef9439`](https://github.com/coconutcraig/laravel-postmark/commit/b004ef9439)
 
 ## [0.1.0] - 2017-01-29