updates gem version, enables compression by default

Author: petethepig

pyroscope_ffi/ruby/lib/pyroscope.rb

@@ -34,7 +34,7 @@ def initialize(*)
       self.report_thread_id = false
       self.log_level = 'error'
       self.tags = {}
-      self.compression = ''
+      self.compression = 'gzip'
       super
     end
   end

pyroscope_ffi/ruby/lib/pyroscope/version.rb

@@ -1,3 +1,3 @@
 module Pyroscope
-  VERSION = '0.3.2'.freeze
+  VERSION = '0.4.0'.freeze
 end