Fix NoMethodError in backend

[edsinclair]

• IRB v1.15.0 renamed build_statement -> parse_input

I didn't include any new tests as this existing test was failing when run with IRB >= 1.15.0

Error: test_eval_one_plus_two(IRubyTest::PlainBackendTest): NoMethodError: undefined method `build_statement' for an instance of IRB::Irb
/Users/eirik/github.com/edsinclair/iruby/lib/iruby/backend.rb:64:in `eval'
/Users/eirik/github.com/edsinclair/iruby/lib/iruby/backend.rb:16:in `eval'
/Users/eirik/github.com/edsinclair/iruby/test/iruby/backend_test.rb:8:in `test_eval_one_plus_two'
      5:     end
      6:
      7:     def test_eval_one_plus_two
  =>  8:       assert_equal 3, @plainbackend.eval('1+2', false)
      9:     end
     10:
     11:     def test_include_module
============================================================================================================================================================
F
============================================================================================================================================================
Failure: test_include_module(IRubyTest::PlainBackendTest):
  Exception raised:
  NoMethodError(<undefined method `build_statement' for an instance of IRB::Irb>)

[edsinclair]

This addresses the issue reported in #363

[sealocal]

LGTM - would be nice to see the test suite pass aside from the Ruby 3.4 issue. Also, a release would be nice so that users can take advantage of these revisions without needing to install from master.

[sealocal]

This method could be moved down to the private methods.

[kojix2]

@edsinclair Thank you!

@sealocal
Hi! Are you interested in committing to IRuby?
If so, the current project owner is @mrkn, so he may be able to grant you commit access (I can't).

[sealocal]

@sealocal Hi! Are you interested in committing to IRuby? If so, the current project owner is @mrkn, so he may be able to grant you commit access (I can't).

Sure, maybe I can help with triaging the backlog of issues.

[kojix2]

@sealocal
Thank you for helping with issue triaging. It’s much appreciated.