v5.0.1

• pursuit PEP8 compliance for gnss_products and read_gnss_prods modules
  • the functions and variables called DForb, DFclk, df_clk ... were homogenized as orb_df and clk_df
• Correct SOFA library import
• Correct bug in write_sp3 regarding time delta determination (timestamp type issue)

What's Changed

• lib SOFA + write_sp3 by @PierreS-alpha in #241

Full Changelog: v5.0.0...v5.0.1