Proposed Fix: Prevent search box from being styled in undesired ways by default

I’ve proposed my update as a pull request here: https://github.com/WebDevStudios/wp-search-with-algolia/pull/18

Without this, I was getting https://cloudup.com/cLMg6yzoP9I (screenshot) on pretty much all sites that use this plugin in Safari. Telling Safari (and others) to not apply special formatting based on it being a search input resolved this issue (screenshot after this change was implemented: https://cloudup.com/cEwn0DO1USb.)

I’m thinking this is safe to implement in this plugin officially, and I’m sure there’s plenty of people out there with Safari users that would be grateful that they don’t need to fix this themselves.