Modernization and major bug fixes for header-only implementation

This release focuses on improving the stability and features of the header-only implementation:

• Major Fixes:

  • Resolved SIGSEGV in execute_all() with trailing whitespace (#78).
  • Fixed memory corruption in string extension results by using SQLITE_TRANSIENT (#81).
  • Fixed execute_all() to handle mixed parameterized and non-parameterized statements (#62).
  • Fixed potential connection leak and hook corruption during database move operations.
  • Fixed potential crash when retrieving NULL values as std::string.

• New Features:

  • Added support for void return types in SQL extension functions and aggregates.
  • Added full char16_t (UTF-16) support for named parameters and stream binding.

• Robustness:

  • Added a self-contained, comprehensive test suite in headeronly_src/test_all.cpp.
  • Modernized the codebase using C++11 features (nullptr, move semantics).
  • Replaced sqlite3_close with sqlite3_close_v2 for safer teardown.

• Project Status:

  • Updated README.md with modern examples and formally designated headeronly_src as the primary maintained implementation.

Bug fixes and user issue supports

• add LICENSE file
• fix a memory leak in database ctor
• c++ compatibility (std::iterator and std::tuple)
• add clearing_bindings() in statement (query and commant)
• support nullptr with binder()
• merge the pull request to check nullptr for string value
• add runnable test cases using memory db. test/testdb.cpp

Uses sqlite3_prepare_v2 instead of deprecated sqlite3_prepare

v1.0.8

Adds a section about execute_all.

Support usages in loadable extensions.

See https://sqlite.org/loadext.html for loadable extensions.

Updates version number definitions in header files.

v1.0.6

Update version number definitions.

Support sqlite3 backup API.

Merge pull request #36 from iwongu/backup

Supports backup methods in database class.

Make dtors not throw exceptions.

v1.0.3 has the changes only in headeronly_src. I forgot to update files in src.

Make dtors not throw exceptions.

v1.0.3

Make dtors not throw exceptions.

More helper methods

changes and extended_error_code added in database.

Bug fixes

Fixes #29