regular expressions in flow_view_deps

[moodymudskipper]

Closes #106

When using the name pattern in the provided vectors, we can provide a regular expression to match functions described in their pkg::fun or pkg:::fun notation. In case of conflict, e.g. if a regex in promote matches a fixed name in demote, the fixed name takes precedence. If 2 regex conflict you're on your own.

library(flow)
flow_view_deps(here::i_am, promote = c(pattern = ".*::g"))

flow_view_deps(here::i_am, promote = c(pattern = "rprojroot::.*"))

flow_view_deps(here::i_am, hide = c(pattern = "here:::s"))

^{Created on 2022-11-24 with reprex v2.0.2}