🔖 update meta for 3.1.0

Change-Id: I5bcc14680b11a42fea2d5ca264b6a5fbbc37e554
Reviewed-on: http://review.couchbase.org/c/couchbase-ruby-client/+/149485
Tested-by: Build Bot <build@couchbase.com>
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>

Author: avsej

README.md

@@ -24,7 +24,7 @@ The library tested with the MRI 2.5, 2.6, 2.7 and 3.0. Supported platforms are L
 Add this line to your application's Gemfile:
 
 ```ruby
-gem "couchbase", "3.0.3"
+gem "couchbase", "3.1.0"
 ```
 
 And then execute:

ext/couchbase/version.hxx

@@ -24,8 +24,8 @@
 namespace couchbase
 {
 constexpr auto BACKEND_VERSION_MAJOR = 1;
-constexpr auto BACKEND_VERSION_MINOR = 3;
-constexpr auto BACKEND_VERSION_PATCH = 1;
+constexpr auto BACKEND_VERSION_MINOR = 4;
+constexpr auto BACKEND_VERSION_PATCH = 0;
 
 inline const std::string&
 sdk_id()

lib/couchbase/version.rb

@@ -33,5 +33,5 @@ module Couchbase
   #    :openssl_headers=>"OpenSSL 1.1.1c FIPS  28 May 2019",
   #    :openssl_runtime=>"OpenSSL 1.1.1c FIPS  28 May 2019"}
   VERSION = {} unless defined?(VERSION) # rubocop:disable Style/MutableConstant
-  VERSION.update(:sdk => "3.1.0.snapshot".freeze)
+  VERSION.update(:sdk => "3.1.0".freeze)
 end