Cleanup click-based source code

platformio/commands/update.py

@@ -1,12 +1,12 @@
 # Copyright (C) Ivan Kravets <me@ikravets.com>
 # See LICENSE for details.
 
-from click import command, echo, style
+import click
 
 from platformio.platforms.base import PlatformFactory
 
 
-@command("update", short_help="Update installed platforms")
+@click.command("update", short_help="Update installed platforms")
 def cli():
 
     installed_platforms = PlatformFactory.get_platforms(
@@ -14,7 +14,7 @@ def cli():
     installed_platforms.sort()
 
     for platform in installed_platforms:
-        echo("\nPlatform %s" % style(platform, fg="cyan"))
-        echo("--------")
-        p = PlatformFactory().newPlatform(platform)
+        click.echo("\nPlatform %s" % click.style(platform, fg="cyan"))
+        click.echo("--------")
+        p = PlatformFactory.newPlatform(platform)
         p.update()