Update httpclient artifact

[lewismc]

Hi Folks,
There are newever versions of the Apache httpclient artifact which this library should consider updating to.
Clients consuming geoip2 have classloading issues due to geoip2 using an old httpclient version.
I'll see if I can get something together and submit a PR.

[oschwald]

We currently use the Google HTTP Client Library, which is what is pulling in the old version of httpclient. We have considered moving to using Apache httpclient directly to help avoid issues like this, but the work for doing so isn't currently scheduled.

[lewismc]

That's a real shame... I will see if I can maybe even submit a patch for transition to httpclient

[oschwald]

I'm not sure if it will work, but have you tried excluding the old version of httpcient? For instance:

    <dependency>
        <groupId>com.maxmind.geoip2</groupId>
        <artifactId>geoip2</artifactId>
        <version>2.2.0</version>
        <exclusions>
          <exclusion>
            <groupId>org.apache.httpcomponents<</groupId>
            <artifactId>httpclient</artifactId>
          </exclusion>
        </exclusions> 
    </dependency>

[irmakozonay]

Excluding the old version worked for me.

[oschwald]

This is fixed by 2.8.0-rc1.