Updating the version ranges of supported technologies in the docs

docs/reference/supported-technologies.md

@@ -16,7 +16,7 @@ The Elastic APM Ruby Agent has built-in support for many frameworks and librarie
 
 ## Ruby [supported-technologies-ruby]
 
-We follow Ruby’s own maintenance policy and officially support all currently maintained versions per [Ruby Maintenance Branches](https://www.ruby-lang.org/en/downloads/branches/).
+We follow Ruby’s own maintenance policy and officially support all currently maintained versions per [Ruby Maintenance Branches](https://www.ruby-lang.org/en/downloads/branches/) < 4.0.
 
 
 ## Web Frameworks and Libraries [supported-technologies-web]
@@ -28,21 +28,21 @@ We test against all supported minor versions of Rails, Sinatra, and Grape.
 
 ### Ruby on Rails [supported-technologies-rails]
 
-We currently support all versions of Rails since 4.2. This follows Rails' own [Security policy](https://rubyonrails.org/security/).
+We currently support Rails >= 4.2 <= 7.2. This follows Rails' own [Security policy](https://rubyonrails.org/security/).
 
 See [Getting started with Rails](/reference/getting-started-rails.md).
 
 
 ### Sinatra [supported-technologies-sinatra]
 
-We currently support all versions of Sinatra since 1.0.
+We currently support Sinatra >= 1.0 <= 2.2.
 
 See [Getting started with Rack](/reference/getting-started-rack.md).
 
 
 ### Grape [supported-technologies-grape]
 
-We currently support all versions of Grape since 1.2.
+We currently support Grape >= 1.2 <= 1.6.
 
 See [Grape example](/reference/getting-started-rack.md#getting-started-grape).
 
@@ -51,21 +51,21 @@ See [Grape example](/reference/getting-started-rack.md#getting-started-grape).
 
 We automatically instrument database actions using:
 
-* ActiveRecord (v4.2+)
-* DynamoDB (v1.0+)
-* Elasticsearch (v0.9+)
-* Mongo (v2.1+)
-* Redis (v3.1+)
-* Sequel (v4.35+)
+* ActiveRecord (>= 4.2 <= 7.2)
+* DynamoDB (>= 1.0 <= 1.158.0)
+* Elasticsearch (>= 0.9 <= 9.2.0)
+* Mongo (>= 2.1 <= 2.22.0)
+* Redis (>= 3.1 <= 5.4.1)
+* Sequel (>= 4.35 <= 5.100.0)
 
 
 ## External HTTP requests [supported-technologies-http]
 
 We automatically instrument and add support for distributed tracing to external requests using these libraries:
 
 * `net/http`
-* Http.rb (v0.6+)
-* Faraday (v0.2.1+)
+* Http.rb (>= 3.0 < 6.0)
+* Faraday (>= 0.2.1 <= 2.14.0)
 
 **Note:** These libraries usually assume `localhost` if no `Host` is specified, so the agent does as well.
 
@@ -74,12 +74,12 @@ We automatically instrument and add support for distributed tracing to external
 
 We automatically instrument background processing using:
 
-* DelayedJob
-* Sidekiq
-* Shoryuken
-* Sneakers (v2.12.0+) (Experimental, see [#676](https://github.com/elastic/apm-agent-ruby/pull/676))
-* Resque (v2.0.0+)
-* SuckerPunch (v2.0.0+)
+* DelayedJob (<= 4.2.0)
+* Sidekiq (<= 8.1.0)
+* Shoryuken (<= 6.2.1)
+* Sneakers (2.12.0) (Experimental, see [#676](https://github.com/elastic/apm-agent-ruby/pull/676))
+* Resque (>= 2.0.0 <= 2.7.0)
+* SuckerPunch (>= 2.0.0 <= 3.3.0)
 
 
 ## Resque [supported-technologies-resque]

elastic-apm.gemspec

@@ -29,14 +29,14 @@ Gem::Specification.new do |spec|
   spec.homepage = 'https://github.com/elastic/apm-agent-ruby'
   spec.metadata = { 'source_code_uri' => 'https://github.com/elastic/apm-agent-ruby' }
   spec.license  = 'Apache-2.0'
-  spec.required_ruby_version = ">= 2.3.0"
+  spec.required_ruby_version = ">= 2.3.0", "< 4.0"
 
   spec.files = `git ls-files -z`.split("\x0").reject do |f|
     f.match(%r{^(test|spec|features)/})
   end
 
   spec.add_dependency('concurrent-ruby', '~> 1.0')
-  spec.add_dependency('http', '>= 3.0')
+  spec.add_dependency('http', '>= 3.0', '< 6.0')
   spec.add_runtime_dependency('ruby2_keywords')
 
   spec.require_paths = ['lib']