Expose version as MODERN_SQLITE_VERSION macro

Can be updated with

    sed -i -r 's/(#define MODERN_SQLITE_VERSION).*$'\
    "/\\1$(git describe --tags|cut -d- -f1,2 --output-delimiter=. \
    |tr '.v' '\n '|dc -e '? 1000 * ? + 1000 * ? 1 + + p')/" hdr/sqlite_modern_cpp.h

Author: zauguin

hdr/sqlite_modern_cpp.h

@@ -11,6 +11,8 @@
 #include <locale>
 #include <codecvt>
 
+#define MODERN_SQLITE_VERSION 3002008
+
 #ifdef __has_include
 #if __cplusplus > 201402 && __has_include(<optional>)
 #define MODERN_SQLITE_STD_OPTIONAL_SUPPORT