Update ruby-net-ldap package to 0.16.3.
0.16.3 (2020-08-18)
* Add Net::LDAP::InvalidDNError #371
* Use require_relative instead of require #360
* Address some warnings and fix JRuby test omissions #365
* Bump rake dev dependency to 12.3 #359
* Enable rubocop in ci #251
* Enhance rubocop configuration and test syntax #344
* CI: Drop rbx-2, uninstallable #364
* Fix RuboCop warnings #312
* Fix wrong error class #305
* CONTRIBUTING.md: Repair link to Issues #309
* Make the generate() method more idiomatic... #326
* Make encode_sort_controls() more idiomatic... #327
* Make the instrument() method more idiomatic... #328
* Fix uninitialised Net::LDAP::LdapPduError #338
* README.rdoc: Use SVG build badge #310
* Update TravisCI config to inclue Ruby 2.7 #346
* add explicit ** to silence Ruby 2.7 warning #342
* Support parsing filters with attribute tags #345
* Bump rubocop development dependency version #336
* Add link to generated and hosted documentation on rubydoc #319
* Fix 'uninitialized constant Net::LDAP::PDU::LdapPduError' error #317
* simplify encoding logic: no more chomping required #362
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