v3.3.6

• Remove unnecessary if-s and else-s (#1189)
• Add go.mod for Go modules (#1187)
• Add go 1.11.x version (#1186)
• Fix issue #1143 (#1176)
• Use HTTP status codes constants where applicable (#1184)
• Change getting method point after overriding method in premiddleware (#1182)
• Logs the internal error message instead of returning it (#1173)
• Jwtconfig adds an HTTPErrorCustom configuration (#1121)
• Add protocol field for logger middleware
• JWT middleware BeforeFunc, SuccessHandler & ErrorHandler functions
• Added error to logger middleware
• Removed error log from http error handler