v3.3.7

• Update dependencies (#1194)
• Simplify REALIP method (#1193)
• Expose stdLogger (#1196)
• Add error variable for too many request (#1181)
• Support internal error when Bind() data #888 (#1164)
• The logging interface add SetHeader method (#1092)
• Add common error variable (#1200)
• Fix node's parameter names assignment problem. (#1201)
• Extend proxy middleware. (#1203)
• Proxy: Better errors + remote custom TLS (#1197)
• Replace http constants with stdlib ones
• Delete useless goto statements (#1208)
• Add back exported HTTP method constants (#1209)