v1.7.9

What's Changed

• add upload contacts support by @KMKoushik in #314
• Hide infinity percentage when no emails sent by @KMKoushik in #319
• add export contact book option by @KMKoushik in #318
• Fix bar chart hover on zero delivery days by @KMKoushik in #320

Full Changelog: v1.7.8...v1.7.9