Log Message:
ruby-nokogiri: update to 1.10.3.

Upstream changelog (from CHANGELOG.md):

## 1.10.3 / 2019-04-22

### Security Notes

[MRI] Pulled in upstream patch from libxslt that addresses CVE-2019-11068. Full \ 
details are available in \ 
[#1892](https://github.com/sparklemotion/nokogiri/issues/1892). Note that this \ 
patch is not yet (as of 2019-04-22) in an upstream release of libxslt.

## 1.10.2 / 2019-03-24

### Security

* [MRI] Remove support from vendored libxml2 for future script macros. [#1871]
* [MRI] Remove support from vendored libxml2 for server-side includes within \ 
attributes. [#1877]

### Bug fixes

* [JRuby] Fix node ownership in duplicated documents. [#1060]
* [JRuby] Rethrow exceptions caught by Java SAX handler. [#1847, #1872] (Thanks, \ 
@adjam!)