v2.0.0

• Added support for file name with wide char ( #66 )
• Added support for specifying index file path ( #45 )
• Added support for more characters in DNA sequence
• Added reverse complement function for DNA conversion ( #69 )
• Improved the performance of kseq library ( #68 )
• Optimized gzip index importing and saving without temp file
• Fixed segmentation fault when using sequence composition ( #67 )
• Fixed memory leak in Fastq read quality integer ( #70 )
• Fixed zlib download url broken error when building