Bump net-ldap from 0.19.0 to 0.20.0

Bumps [net-ldap](https://github.com/ruby-ldap/ruby-net-ldap) from 0.19.0 to 0.20.0.
- [Release notes](https://github.com/ruby-ldap/ruby-net-ldap/releases)
- [Changelog](https://github.com/ruby-ldap/ruby-net-ldap/blob/master/History.rdoc)
- [Commits](https://github.com/ruby-ldap/ruby-net-ldap/compare/v0.19.0...v0.20.0)

---
updated-dependencies:
- dependency-name: net-ldap
  dependency-version: 0.20.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Gemfile

@@ -306,7 +306,7 @@ group :test do
 end
 
 group :ldap do
-  gem "net-ldap", "~> 0.19.0"
+  gem "net-ldap", "~> 0.20.0"
 end
 
 group :development do

Gemfile.lock

@@ -801,7 +801,9 @@ GEM
     net-imap (0.5.10)
       date
       net-protocol
-    net-ldap (0.19.0)
+    net-ldap (0.20.0)
+      base64
+      ostruct
     net-pop (0.1.2)
       net-protocol
     net-protocol (0.2.2)
@@ -1421,7 +1423,7 @@ DEPENDENCIES
   mini_magick (~> 5.3.0)
   multi_json (~> 1.17.0)
   my_page!
-  net-ldap (~> 0.19.0)
+  net-ldap (~> 0.20.0)
   nokogiri (~> 1.18.8)
   oj (~> 3.16.0)
   okcomputer (~> 1.19.0)
@@ -1773,7 +1775,7 @@ CHECKSUMS
   my_page (1.0.0)
   net-http (0.6.0) sha256=9621b20c137898af9d890556848c93603716cab516dc2c89b01a38b894e259fb
   net-imap (0.5.10) sha256=f84d206a296bff48a3a10507567fc38b050d2a40c92ea0d448164f64e60d6205
-  net-ldap (0.19.0) sha256=be2a379ccbd28fc75fb70a94af74e3a9a6866b84574247fc243e0abdd2f82f3d
+  net-ldap (0.20.0) sha256=b2080b350753a9ac4930869ded8e61a1d2151c01e03b0bf07b4675cbd9ce5372
   net-pop (0.1.2) sha256=848b4e982013c15b2f0382792268763b748cce91c9e91e36b0f27ed26420dff3
   net-protocol (0.2.2) sha256=aa73e0cba6a125369de9837b8d8ef82a61849360eba0521900e2c3713aa162a8
   net-smtp (0.5.1) sha256=ed96a0af63c524fceb4b29b0d352195c30d82dd916a42f03c62a3a70e5b70736