Upgrade to unparser 0.7.x interface

Gemfile

@@ -4,4 +4,6 @@ source 'https://rubygems.org'
 
 gemspec name: 'mutant'
 
+gem 'unparser', path: '../unparser'
+
 eval_gemfile 'Gemfile.shared'

Gemfile.lock

@@ -1,3 +1,10 @@
+PATH
+  remote: ../unparser
+  specs:
+    unparser (0.7.0)
+      diff-lcs (~> 1.3)
+      parser (>= 3.3.0)
+
 PATH
   remote: .
   specs:
@@ -6,7 +13,7 @@ PATH
       parser (~> 3.3.0)
       regexp_parser (~> 2.9.0)
       sorbet-runtime (~> 0.5.0)
-      unparser (~> 0.6.14)
+      unparser (~> 0.7.0)
 
 GEM
   remote: https://rubygems.org/
@@ -57,9 +64,6 @@ GEM
     sorbet-runtime (0.5.11422)
     strscan (3.1.0)
     unicode-display_width (2.5.0)
-    unparser (0.6.14)
-      diff-lcs (~> 1.3)
-      parser (>= 3.3.0)
 
 PLATFORMS
   ruby
@@ -70,6 +74,7 @@ DEPENDENCIES
   rspec-core (~> 3.10)
   rspec-its (~> 1.3.0)
   rubocop (~> 1.7)
+  unparser!
 
 BUNDLED WITH
    2.5.6

lib/mutant/parser.rb

@@ -24,11 +24,11 @@ def call(path)
   private
 
     def parse(source)
-      node, comments = Unparser.parse_with_comments(source)
+      ast = Unparser.parse_ast_either(source).from_right
 
       AST.new(
-        node:,
-        comment_associations: ::Parser::Source::Comment.associate_by_identity(node, comments)
+        comment_associations: ::Parser::Source::Comment.associate_by_identity(ast.node, ast.comments),
+        node:                 ast.node
       )
     end
 

mutant.gemspec

@@ -29,7 +29,7 @@ Gem::Specification.new do |gem|
   gem.add_runtime_dependency('parser',         '~> 3.3.0')
   gem.add_runtime_dependency('regexp_parser',  '~> 2.9.0')
   gem.add_runtime_dependency('sorbet-runtime', '~> 0.5.0')
-  gem.add_runtime_dependency('unparser',       '~> 0.6.14')
+  gem.add_runtime_dependency('unparser',       '~> 0.7.0')
 
   gem.add_development_dependency('rspec',      '~> 3.10')
   gem.add_development_dependency('rspec-core', '~> 3.10')