Update gemspec to support Ruby 3.2 (#16)

* Update public key (#14)

* RUBY-3200 support Ruby 3.2 (#15)

As of Ruby 3.2, the "File.exists?" alias for "File.exist?" is gone. The only way to
check for the existence of a file is now "File.exist?".

* version bump

---------

Co-authored-by: Dmitry Rybakov <[email protected]>

Author: jamis

gem-public_cert.pem

@@ -1,20 +1,26 @@
 -----BEGIN CERTIFICATE-----
-MIIDRDCCAiygAwIBAgIBATANBgkqhkiG9w0BAQsFADAmMSQwIgYDVQQDDBtkcml2
-ZXItcnVieS9EQz0xMGdlbi9EQz1jb20wHhcNMTgxMDA0MTczODA5WhcNMTkxMDA0
-MTczODA5WjAmMSQwIgYDVQQDDBtkcml2ZXItcnVieS9EQz0xMGdlbi9EQz1jb20w
-ggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDRXUgGvH0ZtWwDPc2umdHw
-B+INNm6jNTRp8PMyUKxPzxaxX2OiBQk9gLC3zsK9ZmlZu4lNfpHVSCEPoiP/fhPg
-Kyfq2xld3Qz0Pki5d5i0/r14343MTKiNiFulLlbbdlN0cXeEFNJHUycZnD2LOXwz
-egYGHOl14FI8t5visIWtqRnLXXIlDsBHzmeEZjUZRGSgjC0R3RT/I+Fk5yUhn1w4
-rqFyAiW+cjjzmT7mmqT0jV6fd0JFHbKnSgt9iPijKSimBgUOsorHwOTMlTzwsy0d
-ZT+al1RiT5zqlAJLxFHwmoYOxD/bSNtKsYl60ek0hK2mISBVy9BBmLvCgHDx5uSp
-AgMBAAGjfTB7MAkGA1UdEwQCMAAwCwYDVR0PBAQDAgSwMB0GA1UdDgQWBBRbd1mx
-fvSaVIwKI+tnEAYDW/B81zAgBgNVHREEGTAXgRVkcml2ZXItcnVieUAxMGdlbi5j
-b20wIAYDVR0SBBkwF4EVZHJpdmVyLXJ1YnlAMTBnZW4uY29tMA0GCSqGSIb3DQEB
-CwUAA4IBAQAaVV3xYYK7qtbnTzctqafLFN4d6amxzWGs4KYpnCSr1BRJQYIiq8Zp
-hjTZoOQlEiUP/4TlNg81sO4TY8RPbE3SAeIEfPWTiQYT7bD51KwOdOtegXSbhn5a
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-JvwE2HAT8fOpY1c60+KRpfRKddtgMo7R
+MIIEeDCCAuCgAwIBAgIBATANBgkqhkiG9w0BAQsFADBBMREwDwYDVQQDDAhkYngt
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+CQYDVR0TBAIwADALBgNVHQ8EBAMCBLAwHQYDVR0OBBYEFH4nnr4tYlatU57RbExW
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+MBaBFGRieC1ydWJ5QG1vbmdvZGIuY29tMA0GCSqGSIb3DQEBCwUAA4IBgQAVSlgM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=
 -----END CERTIFICATE-----

lib/mongo/auth/kerberos/version.rb

@@ -17,7 +17,7 @@ module Auth
     class Kerberos
 
       # The gem version number.
-      VERSION = '2.1.0'.freeze
+      VERSION = '2.1.1'.freeze
     end
   end
 end

mongo_kerberos.gemspec

@@ -13,7 +13,7 @@ Gem::Specification.new do |s|
   s.description       = 'Adds Kerberos authentication via libsasl to the MongoDB Ruby Driver on MRI and JRuby'
   s.license           = 'Apache License Version 2.0'
 
-  if File.exists?('gem-private_key.pem')
+  if File.exist?('gem-private_key.pem')
     s.signing_key = 'gem-private_key.pem'
     s.cert_chain  = ['gem-public_cert.pem']
   else