microeco v1.4.0

• add DCA method in cal_ordination of trans_beta
• add glmm_beta option in method parameter of trans_diff
• add Pielou evenness index in cal_alphadiv function of microtable
• add heatmap for formula usage in plot_alpha of trans_alpha
• fix the ordination axis text issue in trans_env
• use Machine double.eps in pseudo count of trans_diff
• change sort_samples parameter to default FALSE in plot_bar of trans_venn
• fix tidy_taxonomy function match issue in pattern parameter
• add message for the trans_spe_func_perc func in trans_func class
• update the document of cal_alphadiv and cal_betadiv in microtable