Linter update (#7)

Author: christiancabarrocas

.swiftlint.yml

@@ -26,6 +26,7 @@ opt_in_rules: # some rules are turned off by default, so you need to opt-in
 included: 
   - Sources
 excluded: # case-sensitive paths to ignore during linting. Takes precedence over `included`
+  - .build
   - Carthage
   - Pods
   - Sources/ExcludedFolder
@@ -71,4 +72,4 @@ custom_rules:
      regex: '\}[^\n]*\n[^\n]*func'
      severity: error
      message: "functions should start with newline"
-reporter: "xcode" # reporter type (xcode, json, csv, checkstyle, junit, html, emoji)
+reporter: "xcode" # reporter type (xcode, json, csv, checkstyle, junit, html, emoji)