Added Hyperscan and PIRE under regexps section

Author: Flig

README.md

@@ -677,8 +677,10 @@ A curated list of awesome C++ (or C) frameworks, libraries, resources, and shiny
 
 * [CppVerbalExpressions](https://github.com/VerbalExpressions/CppVerbalExpressions) - C++ regular expressions made easy. [MIT]
 * [CTRE](https://github.com/hanickadot/compile-time-regular-expressions) - A Compile time PCRE (almost) compatible regular expression matcher. [MIT]
+* [Hyperscan] (https://github.com/intel/hyperscan)- Hyperscan is a high-performance multiple regex matching library by Intel. Provides simultaneous matching of large numbers of regexps (up to tens of thousands). Typically used in a DPI library stack.
 * [Oniguruma](https://github.com/kkos/oniguruma) - A modern and flexible regular expressions library that supports a variety of character encodings. [BSD]
 * [PCRE](http://pcre.org/) - A regular expression C library inspired by the regular expression capabilities in Perl. [BSD]
+* [PIRE] (https://github.com/yandex/pire) - Perl Incompatible Regular Expressions library by Yandex. Can be really fast (more than 400 MB/s)
 * [RE2](https://github.com/google/re2) - A software library for regular expressions via a finite-state machine using automata theory. [BSD-3-Clause]
 * [SLRE](https://github.com/cesanta/slre) - Super Light Regexp engine for C/C++. [GPLv2/Commercial]
 * [sregex](https://github.com/openresty/sregex) - A non-backtracking NFA/DFA-based Perl-compatible regex engine library for matching on large data streams. [BSD]