Update yard requirement from ~> 0.6.0 to ~> 0.9.20

Updates the requirements on [yard](https://github.com/lsegal/yard) to permit the latest version.
- [Release notes](https://github.com/lsegal/yard/releases)
- [Changelog](https://github.com/lsegal/yard/blob/master/CHANGELOG.md)
- [Commits](lsegal/yard@v0.6.8...v0.9.20)

Signed-off-by: dependabot[bot] <[email protected]>

Gemfile

@@ -23,7 +23,7 @@ group :development, :test do
   gem 'rb-readline'
   gem 'pry'
 
-  gem "yard", "~> 0.6.0"
+  gem "yard", "~> 0.9.20"
   gem "rspec"
   gem "aruba"
 

Gemfile.lock

@@ -98,18 +98,13 @@ GEM
       diff-lcs (~> 1.1.3)
     rspec-mocks (2.10.1)
     sexp_processor (3.2.0)
-    simplecov (0.6.4)
-      multi_json (~> 1.0)
-      simplecov-html (~> 0.5.3)
-    simplecov-html (0.5.3)
-    simplecov-vim (0.0.1)
     slop (2.4.4)
     thor (0.15.2)
     webmock (1.8.7)
       addressable (>= 2.2.7)
       crack (>= 0.1.7)
     yamler (0.1.0)
-    yard (0.6.8)
+    yard (0.9.20)
 
 PLATFORMS
   ruby
@@ -135,7 +130,5 @@ DEPENDENCIES
   pry
   rb-readline
   rspec
-  simplecov
-  simplecov-vim
   webmock
-  yard (~> 0.6.0)
+  yard (~> 0.9.20)

smartdict-core.gemspec

@@ -96,7 +96,7 @@ Gem::Specification.new do |s|
       s.add_development_dependency(%q<guard-rspec>, [">= 0"])
       s.add_development_dependency(%q<rb-readline>, [">= 0"])
       s.add_development_dependency(%q<pry>, [">= 0"])
-      s.add_development_dependency(%q<yard>, ["~> 0.6.0"])
+      s.add_development_dependency(%q<yard>, "~> 0.9.20")
       s.add_development_dependency(%q<rspec>, [">= 0"])
       s.add_development_dependency(%q<aruba>, [">= 0"])
       s.add_development_dependency(%q<bundler>, ["~> 1.1.2"])
@@ -121,7 +121,7 @@ Gem::Specification.new do |s|
       s.add_dependency(%q<guard-rspec>, [">= 0"])
       s.add_dependency(%q<rb-readline>, [">= 0"])
       s.add_dependency(%q<pry>, [">= 0"])
-      s.add_dependency(%q<yard>, ["~> 0.6.0"])
+      s.add_dependency(%q<yard>, "~> 0.9.20")
       s.add_dependency(%q<rspec>, [">= 0"])
       s.add_dependency(%q<aruba>, [">= 0"])
       s.add_dependency(%q<bundler>, ["~> 1.1.2"])
@@ -147,7 +147,7 @@ Gem::Specification.new do |s|
     s.add_dependency(%q<guard-rspec>, [">= 0"])
     s.add_dependency(%q<rb-readline>, [">= 0"])
     s.add_dependency(%q<pry>, [">= 0"])
-    s.add_dependency(%q<yard>, ["~> 0.6.0"])
+    s.add_dependency(%q<yard>, "~> 0.9.20")
     s.add_dependency(%q<rspec>, [">= 0"])
     s.add_dependency(%q<aruba>, [">= 0"])
     s.add_dependency(%q<bundler>, ["~> 1.1.2"])