[FIX]: Router does not cache compiled regex

[NikSimDev]

Version

v0.1.5

Severity

Minor (annoyance)

Problem Description

// Each match() recompiles the regex
if (route.match(target, params)) {  // std::regex(pattern) every time?

Solution:

class Route {
    std::regex pattern_;  // Compiled once
};

Verification

• I have searched for existing issues
• I am using the latest version
• I have provided a minimal reproduction