Fix block and proc definition to work with Ruby 3.0

[JHK]

This should fix the following warning in Ruby 2.7, which will become breaking in 3.0:

/var/lib/gems/2.7.0/gems/arachnid2-0.4.0/lib/arachnid2/typhoeus.rb:27: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead

[breunigs]

I think this one you missed:

/var/lib/gems/2.7.0/bundler/gems/arachnid2-91b3a8cddc03/lib/arachnid2.rb:112: warning: Capturing the given block using Proc.new is deprecated; use `&block` instead

[samnissen]

Do tests pass for you? I get:

  1) Arachnid2::Typhoeus#crawl data is available in the cache loads data from the cache
     Failure/Error: use_response(data, &Proc.new) if data

     ArgumentError:
       tried to create Proc object without a block
     # ./lib/arachnid2/typhoeus.rb:61:in `new'
     # ./lib/arachnid2/typhoeus.rb:61:in `use_cache'
     # ./lib/arachnid2/typhoeus.rb:23:in `block in crawl'
     # ./lib/arachnid2/typhoeus.rb:17:in `times'
     # ./lib/arachnid2/typhoeus.rb:17:in `crawl'
     # ./spec/arachnid2/typhoeus_spec.rb:90:in `block (4 levels) in <top (required)>'

  2) Arachnid2::Watir#crawl accepts the options
     Failure/Error: make_request(q, &Proc.new)

     ArgumentError:
       tried to create Proc object without a block
     # ./lib/arachnid2/watir.rb:26:in `new'
     # ./lib/arachnid2/watir.rb:26:in `crawl'
     # ./spec/arachnid2/watir_spec.rb:36:in `block (3 levels) in <top (required)>'

# ...

I had a number of issues getting the tests to run, and need to repair the gemspec. Look out for that if that's helpful

[JHK]

With the Gemfile in the current project the tests don't work for me. Updating some gems and bundler itself worked. I had a successful test run with this patch:

Finished in 2 minutes 34.8 seconds (files took 2.01 seconds to load)
16 examples, 0 failures

Wasn't sure if I should include the Gemfile.lock patch into this PR. Here would be the diff:

diff --git a/Gemfile.lock b/Gemfile.lock
index 4810802..995f27a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    arachnid2 (0.3.9)
+    arachnid2 (0.4.0)
       addressable
       adomain
       bloomfilter-rb
@@ -16,28 +16,28 @@ GEM
   specs:
     addressable (2.7.0)
       public_suffix (>= 2.0.2, < 5.0)
-    adomain (0.2.3)
+    adomain (0.2.4)
       addressable (~> 2.5)
       logger
     bloomfilter-rb (2.1.1)
       redis
     childprocess (3.0.0)
     diff-lcs (1.3)
-    ethon (0.12.0)
-      ffi (>= 1.3.0)
+    ethon (0.14.0)
+      ffi (>= 1.15.0)
     facets (3.1.0)
-    ffi (1.12.2)
-    json (2.3.0)
-    logger (1.4.2)
-    mini_portile2 (2.4.0)
-    nokogiri (1.10.9)
-      mini_portile2 (~> 2.4.0)
-    os (1.0.1)
-    psych (3.1.0)
-    public_suffix (4.0.3)
+    ffi (1.15.0)
+    json (2.5.1)
+    logger (1.4.3)
+    nokogiri (1.11.3-x86_64-darwin)
+      racc (~> 1.4)
+    os (1.1.1)
+    psych (3.3.1)
+    public_suffix (4.0.6)
+    racc (1.5.2)
     rake (13.0.1)
-    redis (4.1.3)
-    regexp_parser (1.7.0)
+    redis (4.2.5)
+    regexp_parser (2.1.1)
     rspec (3.8.0)
       rspec-core (~> 3.8.0)
       rspec-expectations (~> 3.8.0)
@@ -51,22 +51,22 @@ GEM
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.8.0)
     rspec-support (3.8.0)
-    rubyzip (2.2.0)
+    rubyzip (2.3.0)
     selenium-webdriver (3.142.7)
       childprocess (>= 0.5, < 4.0)
       rubyzip (>= 1.2.2)
-    typhoeus (1.3.1)
+    typhoeus (1.4.0)
       ethon (>= 0.9.0)
-    watir (6.16.5)
-      regexp_parser (~> 1.2)
-      selenium-webdriver (~> 3.6)
-    webdriver-user-agent (7.6)
+    watir (6.19.1)
+      regexp_parser (>= 1.2, < 3)
+      selenium-webdriver (>= 3.142.7)
+    webdriver-user-agent (7.8)
       facets
       json
       os
       psych
       selenium-webdriver (>= 3.4.0)
-    webdrivers (4.2.0)
+    webdrivers (4.6.0)
       nokogiri (~> 1.6)
       rubyzip (>= 1.3.0)
       selenium-webdriver (>= 3.0, < 4.0)
@@ -81,4 +81,4 @@ DEPENDENCIES
   rspec (~> 3.0)

 BUNDLED WITH
-   1.17.3
+   2.2.14