Release v0.1.2

• Bug fix for accessing columns ending with Z

• Bug fix for parsing float numbers with scientific notation

• Support for local worksheet names and constants

• Add stop_in_row_function option to XLSX.gettable method

• Improved columns detection for XLSX.getable method

• Added method XLSX.openxlsx for lazy-loading of Excel file content

• Method XLSX.read is deprecated in favor of XLSX.readxlsx

• A few optimizations