Browser should be refreshed after changes in project files by default

[jedrzejchalubek]

Add paths for files to watch to default config of browsersync:

https://browsersync.io/docs/options/#option-files

"files": [
    "*.php",
    "app/**/*.php",
    "resources/templates/**/*.php",
    "resources/assets/fonts/**/*",
    "resources/assets/js/**/*.js",
    "resources/assets/sass/**/*.scss",
    "resources/assets/images/**/*.{jpg,jpeg,png,gif,svg}"
]