Bump sinatra from 1.3.5 to 2.2.3 in /api/ruby/basics-of-authentication

Bumps [sinatra](https://github.com/sinatra/sinatra) from 1.3.5 to 2.2.3.
- [Release notes](https://github.com/sinatra/sinatra/releases)
- [Changelog](https://github.com/sinatra/sinatra/blob/master/CHANGELOG.md)
- [Commits](sinatra/sinatra@1.3.5...v2.2.3)

---
updated-dependencies:
- dependency-name: sinatra
  dependency-type: direct:production
...

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

Author: dependabot[bot]

api/ruby/basics-of-authentication/Gemfile

@@ -1,4 +1,4 @@
 source "https://rubygems.org"
 
 gem "rest-client", "~> 1.8.0"
-gem "sinatra",     "~> 1.3.5"
+gem "sinatra",     "~> 2.2.3"

api/ruby/basics-of-authentication/Gemfile.lock

@@ -1,24 +1,28 @@
 GEM
-  remote: http://rubygems.org/
+  remote: https://rubygems.org/
   specs:
     domain_name (0.5.20190701)
       unf (>= 0.0.5, < 1.0.0)
     http-cookie (1.0.3)
       domain_name (~> 0.5)
     mime-types (2.99.3)
+    mustermann (2.0.2)
+      ruby2_keywords (~> 0.0.1)
     netrc (0.11.0)
-    rack (1.6.13)
-    rack-protection (1.3.2)
+    rack (2.2.5)
+    rack-protection (2.2.3)
       rack
     rest-client (1.8.0)
       http-cookie (>= 1.0.2, < 2.0)
       mime-types (>= 1.16, < 3.0)
       netrc (~> 0.7)
-    sinatra (1.3.5)
-      rack (~> 1.4)
-      rack-protection (~> 1.3)
-      tilt (~> 1.3, >= 1.3.3)
-    tilt (1.3.3)
+    ruby2_keywords (0.0.5)
+    sinatra (2.2.3)
+      mustermann (~> 2.0)
+      rack (~> 2.2)
+      rack-protection (= 2.2.3)
+      tilt (~> 2.0)
+    tilt (2.0.11)
     unf (0.1.4)
       unf_ext
     unf_ext (0.0.7.6)
@@ -28,7 +32,7 @@ PLATFORMS
 
 DEPENDENCIES
   rest-client (~> 1.8.0)
-  sinatra (~> 1.3.5)
+  sinatra (~> 2.2.3)
 
 BUNDLED WITH
    1.17.2