Add 'user sets file path', 'user executes function', 'user drags-and-drops', 'user presses', 'URL should contain', browser alert, new window steps

What's Changed

• Add 'user sets file path' step by @Marketionist in #44
• Enable linting for semicolons by @Marketionist in #45
• Add 'user executes function' step by @Marketionist in #46
• Add 'user drags-and-drops' step by @Marketionist in #47
• Add 'user accepts browser alert' step by @Marketionist in #48
• Add 'user dismisses browser alert' step by @Marketionist in #49
• Add 'user opens in new browser window', 'URL should contain' steps by @Marketionist in #50
• Add 'user closes current browser window' step by @Marketionist in #51
• Add 'user presses' step by @Marketionist in #52

Full Changelog: v0.11.0...v0.12.0