jsoncpp: bump version

keep lib:libjsoncpp version 22 for compatibility.

dev-libs/jsoncpp/patches/jsoncpp-1.9.3.patchset

@@ -0,0 +1,22 @@
+From bb65fc8bc61a9af3063f3bbb9cc55ed8313d4b1c Mon Sep 17 00:00:00 2001
+From: Jerome Duval <jerome.duval@gmail.com>
+Date: Fri, 20 Mar 2020 17:54:32 +0100
+Subject: protect EOF
+
+
+diff --git a/src/lib_json/json_reader.cpp b/src/lib_json/json_reader.cpp
+index 0c1e88d..a8957a8 100644
+--- a/src/lib_json/json_reader.cpp
++++ b/src/lib_json/json_reader.cpp
+@@ -107,7 +107,7 @@ bool Reader::parse(std::istream& is, Value& root, bool collectComments) {
+   // Since String is reference-counted, this at least does not
+   // create an extra copy.
+   String doc;
+-  std::getline(is, doc, static_cast<char> EOF);
++  std::getline(is, doc, static_cast<char> (EOF));
+   return parse(doc.data(), doc.data() + doc.size(), root, collectComments);
+ }
+ 
+-- 
+2.24.0
+