Updated .yamllint to the latest version

Author: frenck

.yamllint

@@ -4,10 +4,14 @@ rules:
     level: error
     min-spaces-inside: 0
     max-spaces-inside: 1
+    min-spaces-inside-empty: -1
+    max-spaces-inside-empty: -1
   brackets:
     level: error
     min-spaces-inside: 0
     max-spaces-inside: 0
+    min-spaces-inside-empty: -1
+    max-spaces-inside-empty: -1
   colons:
     level: error
     max-spaces-before: 0