package/cpp-httplib: bump to version 0.19.0

For release note, see:
https://github.com/yhirose/cpp-httplib/releases/tag/v0.19.0

Signed-off-by: Aleksandr Makarov <aleksandr.o.makarov@gmail.com>
[Julien: add link to release note]
Signed-off-by: Julien Olivain <ju.o@free.fr>

package/cpp-httplib/cpp-httplib.hash

@@ -1,3 +1,3 @@
 # Locally computed:
-sha256  6ed5894bbbc4a34a0f4c5e962672d0003d2ea099bbadacc66f6dee2b213ff394  cpp-httplib-0.18.0.tar.gz
+sha256  c9b9e0524666e1cd088f0874c57c1ce7c0eaa8552f9f4e15c755d5201fc8c608  cpp-httplib-0.19.0.tar.gz
 sha256  4b45cbe16d7b71b89ae6127e26e0d90a029198ca5e958ad8e3d0b8bbed364d8b  LICENSE

package/cpp-httplib/cpp-httplib.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-CPP_HTTPLIB_VERSION = 0.18.0
+CPP_HTTPLIB_VERSION = 0.19.0
 CPP_HTTPLIB_SITE = $(call github,yhirose,cpp-httplib,v$(CPP_HTTPLIB_VERSION))
 CPP_HTTPLIB_LICENSE = MIT
 CPP_HTTPLIB_LICENSE_FILES = LICENSE