Breaking
- Copy raw regex string to JS template, thanks to s-weigand.
This fixes the way that the `copybutton_prompt_text` value is injected into `copybutton.js_t` (as discussed in 86).
The raw string formatting means that backslashes are now propagated correctly and removes the need for "double escaping".
Users will need to update their `copybutton_prompt_text` string accordingly.
Changed
- Upgraded [lodash](https://github.com/lodash/lodash) from 4.17.15 to 4.17.19