Component aliases not always found.

[gin0115]

When an alias is added via a 3rd party module, isset() sometimes fail, this should be replaced with array_key_exists()

[gin0115]

in get_component_path() of Component_Compiler class, change

if ( \isset( $this->component_aliases[get_class( $component ) ] ) ) {
   return esc_attr( $aliases[ get_class( $component ) ] );
}

to

if ( \array_key_exists( get_class( $component ), $this->component_aliases ) ) {
   return esc_attr( $aliases[ get_class( $component ) ] );
}