feat: update client to 1.5.0 (#9)

Author: bednar

CHANGELOG.md

@@ -3,6 +3,9 @@
 ### Features
 1. [#8](https://github.com/influxdata/influxdb-plugin-fluent/pull/8): Added support for nested fields
 
+### Dependencies
+1. [#9](https://github.com/influxdata/influxdb-plugin-fluent/pull/9): Upgrade InfluxDB client to 1.5.0
+
 ## 1.3.0 [2020-05-15]
 
 ### Dependencies

influxdb-plugin-fluent.gemspec

@@ -47,7 +47,7 @@ Gem::Specification.new do |spec|
   spec.required_ruby_version = '>= 2.2.0'
 
   spec.add_runtime_dependency 'fluentd', '~> 1.8'
-  spec.add_runtime_dependency 'influxdb-client', '1.4.0'
+  spec.add_runtime_dependency 'influxdb-client', '1.5.0'
 
   spec.add_development_dependency 'bundler', '~> 2.0'
   spec.add_development_dependency 'codecov', '~> 0.1.16'