microeco v2.0.0

• support running several visualization functions directly with the previous statistical functions
• update FAPROTAX version to 1.2.12 in trans_func class
• optimize the cal_func function in trans_func class
• add more transformation methods from vegan package in trans_norm class
• add remove_zero parameter in cal_func_FR function of trans_func class
• use linesize instead of size in plot_box in trans_abund class
• use linewidth in plot_scatterfit function of trans_env class
• add sample_name parameter in subset_network function in trans_network class
• add parameters for second type of points in ordination visualization
• add plot_volcano function in trans_diff class
• add_rownames2tax instead of rownames2taxonomy in microtable class