Bump version

logstash-filter-transaction_time.gemspec

@@ -1,6 +1,6 @@
 Gem::Specification.new do |s|
   s.name          = 'logstash-filter-transaction_time'
-  s.version       = '1.0.5'
+  s.version       = '1.0.6'
   s.licenses      = ['Apache-2.0','Apache License (2.0)']
   s.summary       = 'Writes the time difference between two events in a transaction to a new event'
   s.description   = 'This gem is a Logstash plugin required to be installed on top of the Logstash core pipeline using $LS_HOME/bin/logstash-plugin install gemname. This gem is not a stand-alone program. Source-code and documentation available at github: https://github.com/AddinITAB/logstash-filter-transaction_time'