Fix RSpec deprecations

[pirj]

Description

This fixes some RSpec deprecations (see this for more details) and switches RSpec to fail on deprecations.

  4) YARD::Tags::TypesExplainer YARD::Tags::TypesExplainer::Parser#parse fails on any unrecognized character
     Failure/Error: expect(lambda { parse(types) }).to raise_error(SyntaxError)
       The implicit block expectation syntax is deprecated, you should pass a block rather than an argument to `expect` to use the provided block expectation matcher or the matcher must implement `supports
_value_expectations?`. e.g  `expect { value }.to raise SyntaxError` not `expect(value).to raise SyntaxError`
     # ./spec/tags/types_explainer_spec.rb:15:in `parse_fail'
     # ./spec/tags/types_explainer_spec.rb:170:in `block (3 levels) in <top (required)>'
     # ./spec/spec_helper.rb:129:in `block (2 levels) in <top (required)>'

  5) YARD::Templates::Engine::Template__Users_pirj_source_yard_templates_default_tags param tags on non-methods does not display @param tags on non-method objects
     Failure/Error: expect(proc).not_to raise_error
       The implicit block expectation syntax is deprecated, you should pass a block rather than an argument to `expect` to use the provided block expectation matcher or the matcher must implement `supports
_value_expectations?`. e.g  `expect { value }.to raise Exception` not `expect(value).to raise Exception`
     # ./spec/templates/tag_spec.rb:49:in `block (3 levels) in <top (required)>'
     # ./spec/spec_helper.rb:129:in `block (2 levels) in <top (required)>'

Completed Tasks

• I have read the Contributing Guide.
• The pull request is complete (implemented / written).
• Git commits have been cleaned up (squash WIP / revert commits).
• I wrote tests and ran bundle exec rake locally (if code is attached to PR).

[lsegal]

Thanks for the PR!