Bump phoenix_live_reload from 1.2.0 to 1.2.1

[dependabot-preview[bot]]

Bumps phoenix_live_reload from 1.2.0 to 1.2.1.

Changelog

*Sourced from [phoenix_live_reload's changelog](https://github.com/phoenixframework/phoenix_live_reload/blob/v1.2.1/CHANGELOG.md).* > ## 1.2.1 (2019-05-24) > > * Enhancements > * Allow custom file_system backend options

Commits

- [`23bafbc`](https://github.com/phoenixframework/phoenix_live_reload/commit/23bafbc62286d6ece013d0c89d7360cb2f2e63f9) Release v1.2.1 - [`f6c0805`](https://github.com/phoenixframework/phoenix_live_reload/commit/f6c08053d4e72572d34dda13d9b25709d900d9a6) Revert "Use window.parent instead of window.top for reload ([#92](https://github-redirect.dependabot.com/phoenixframework/phoenix_live_reload/issues/92))" ([#93](https://github-redirect.dependabot.com/phoenixframework/phoenix_live_reload/issues/93)) - [`c89889a`](https://github.com/phoenixframework/phoenix_live_reload/commit/c89889af27273ad3f400b90a4babaee7bc76d685) Use window.parent instead of window.top for reload ([#92](https://github-redirect.dependabot.com/phoenixframework/phoenix_live_reload/issues/92)) - [`22b118e`](https://github.com/phoenixframework/phoenix_live_reload/commit/22b118e0094cc461fe2d2f31c16aba71acf2b6e8) Add user doc for :dirs/:backend_opts to README ([#91](https://github-redirect.dependabot.com/phoenixframework/phoenix_live_reload/issues/91)) - [`1cca7e2`](https://github.com/phoenixframework/phoenix_live_reload/commit/1cca7e21ad7c16cbaceb8ebd53d0f235af465cd6) Allow passing custom directories and backend options ([#90](https://github-redirect.dependabot.com/phoenixframework/phoenix_live_reload/issues/90)) - See full diff in [compare view](https://github.com/phoenixframework/phoenix_live_reload/compare/v1.2.0...v1.2.1)

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[dependabot-preview[bot]]

Looks like phoenix_live_reload is up-to-date now, so this is no longer needed.