Fix minimal build, allow building without boost::serialization (#6932)

* make sure that we can build without boost iostreams or seralization

adds some "private" variables on the python side to check for these compilation flags

* get out minimal cmake version correct

* get minimallib js building

installs an up-to-date cmake
also updates the version of boost being used for the minimallib
adds extra argument to allow the repo to be specified

Code/GraphMol/SubstructLibrary/SubstructLibrary.cpp

@@ -565,6 +565,7 @@ bool SubstructLibrary::hasMatch(const ExtendedQueryMol &query,
 
 void SubstructLibrary::toStream(std::ostream &ss) const {
 #ifndef RDK_USE_BOOST_SERIALIZATION
+  RDUNUSED_PARAM(ss);
   PRECONDITION(0, "Boost SERIALIZATION is not enabled")
 #else
   boost::archive::text_oarchive ar(ss);
@@ -580,6 +581,7 @@ std::string SubstructLibrary::Serialize() const {
 
 void SubstructLibrary::initFromStream(std::istream &ss) {
 #ifndef RDK_USE_BOOST_SERIALIZATION
+  RDUNUSED_PARAM(ss);
   PRECONDITION(0, "Boost SERIALIZATION is not enabled")
 #else
   boost::archive::text_iarchive ar(ss);