Merge branch '115-add-lpg-as-fuel-type' into 'master'

Resolve "Add LPG as fuel type"

Closes #115

See merge request jankstudio/resq!98

src/Ramcar/FuelType.php

@@ -6,9 +6,11 @@ class FuelType extends NameValue
 {
     const GAS       = 'gas';
     const DIESEL    = 'diesel';
+    const LPG       = 'lpg';
 
     const COLLECTION = [
         'gas' => 'Gas',
         'diesel' => 'Diesel',
+        'lpg' => 'LPG',
     ];
 }