Fix: occasional sincedb write issue on Windows machines (#283)

On Windows servers we occasionally get exceptions `unknown IOException: java.io.IOException: The handle is invalid` when writing to sincedb file which crashes the plugin and somehow messes with the sincedb file which results in old log files being reprocessed causing duplicates. This change eliminates those exceptions.

Author: fishie

Diff for: CHANGELOG.md

@@ -1,3 +1,6 @@
+## 4.2.4
+  - Fix: sincedb_write issue on Windows machines [#283](https://github.com/logstash-plugins/logstash-input-file/pull/283)
+
 ## 4.2.3
   - Refactor: improve debug logging (log catched exceptions) [#280](https://github.com/logstash-plugins/logstash-input-file/pull/280)
 

Diff for: lib/filewatch/sincedb_collection.rb

@@ -232,7 +232,7 @@ def atomic_write(time)
 
     # @return expired keys
     def non_atomic_write(time)
-      IO.open(IO.sysopen(@full_path, "w+")) do |io|
+      File.open(@full_path, "w+") do |io|
         @serializer.serialize(@sincedb, io, time.to_f)
       end
     end

Diff for: logstash-input-file.gemspec

@@ -1,7 +1,7 @@
 Gem::Specification.new do |s|
 
   s.name            = 'logstash-input-file'
-  s.version         = '4.2.3'
+  s.version         = '4.2.4'
   s.licenses        = ['Apache-2.0']
   s.summary         = "Streams events from files"
   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"