Use ruby/setup-ruby instead of deprecated one

[kachick]

https://github.com/rubyide/vscode-ruby/runs/2107273120 fails with following message

Run actions/setup-ruby@v1
  with:
    ruby-version: 2.4
------------------------
NOTE: This action is deprecated and is no longer maintained.
Please, migrate to https://github.com/ruby/setup-ruby, which is being actively maintained.
------------------------
Error: Version 2.4 not found

So just tried to use it... 🤔

[codecov]

Codecov Report

Merging #710 (b65920a) into master (9f12c66) will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master    #710   +/-   ##
======================================
  Coverage    5.08%   5.08%           
======================================
  Files          10      10           
  Lines         118     118           
  Branches       20      20           
======================================
  Hits            6       6           
  Misses        112     112           

Flag	Coverage Δ
language_server_ruby	5.08% <ø> (ø)

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[kachick]

ref: actions/setup-ruby#97 👀

[kachick]

Failing only in Ruby 2.5.8 with debase gem

https://github.com/rubyide/vscode-ruby/pull/710/checks?check_run_id=2107314420

Building native extensions. This could take a while...
ERROR:  Error installing debase:
1 gem installed
	ERROR: Failed to build gem native extension.

    current directory: /Users/runner/hostedtoolcache/Ruby/2.5.8/x64/lib/ruby/gems/2.5.0/gems/debase-0.2.4.1/ext
/Users/runner/hostedtoolcache/Ruby/2.5.8/x64/bin/ruby -r ./siteconf20210314-7558-1r0wfrn.rb extconf.rb
checking for vm_core.h... no
checking for vm_core.h... no
**************************************************************************
No source for ruby-2.5.8-p224 (revision 67882) provided with
debase-ruby_core_source gem. Falling back to ruby-2.5.1-p57.
**************************************************************************
checking for vm_core.h... yes
checking for iseq.h... yes
checking for version.h... yes
checking for vm_core.h... yes
checking for vm_insnhelper.h... yes
checking for vm_core.h... yes
checking for method.h... yes
creating Makefile

current directory: /Users/runner/hostedtoolcache/Ruby/2.5.8/x64/lib/ruby/gems/2.5.0/gems/debase-0.2.4.1/ext
make "DESTDIR=" clean

current directory: /Users/runner/hostedtoolcache/Ruby/2.5.8/x64/lib/ruby/gems/2.5.0/gems/debase-0.2.4.1/ext
make "DESTDIR="
compiling breakpoint.c
compiling context.c
compiling debase_internals.c
debase_internals.c:319:25: warning: initializing 'rb_control_frame_t *' (aka 'struct rb_control_frame_struct *') with an expression of type 'const rb_control_frame_t *' (aka 'const struct rb_control_frame_struct *') discards qualifiers [-Wincompatible-pointer-types-discards-qualifiers]
    rb_control_frame_t *start_cfp = RUBY_VM_END_CONTROL_FRAME(TH_INFO(thread));
                        ^           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
debase_internals.c:697:24: warning: initializing 'rb_iseq_t *' (aka 'struct rb_iseq_struct *') with an expression of type 'const rb_iseq_t *' (aka 'const struct rb_iseq_struct *') discards qualifiers [-Wincompatible-pointer-types-discards-qualifiers]
            rb_iseq_t *iseq = my_iseqw_check(rb_iseq);
                       ^      ~~~~~~~~~~~~~~~~~~~~~~~
debase_internals.c:700:17: error: implicit declaration of function 'rb_iseq_trace_set' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
                rb_iseq_trace_set(iseq, RUBY_EVENT_TRACEPOINT_ALL);
                ^
debase_internals.c:708:24: warning: initializing 'rb_iseq_t *' (aka 'struct rb_iseq_struct *') with an expression of type 'const rb_iseq_t *' (aka 'const struct rb_iseq_struct *') discards qualifiers [-Wincompatible-pointer-types-discards-qualifiers]
            rb_iseq_t *iseq = my_iseqw_check(rb_iseq);
                       ^      ~~~~~~~~~~~~~~~~~~~~~~~
debase_internals.c:711:17: error: implicit declaration of function 'rb_iseq_trace_set' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
                rb_iseq_trace_set(iseq, RUBY_EVENT_NONE);
                ^
debase_internals.c:768:64: warning: incompatible pointer types passing 'void (VALUE, VALUE)' (aka 'void (unsigned long, unsigned long)') to parameter of type 'VALUE (*)()' (aka 'unsigned long (*)()') [-Wincompatible-pointer-types]
  rb_define_module_function(mDebase, "set_trace_flag_to_iseq", Debase_set_trace_flag_to_iseq, 1);
                                                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/runner/hostedtoolcache/Ruby/2.5.8/x64/include/ruby-2.5.0/ruby/ruby.h:1716:57: note: passing argument to parameter here
void rb_define_module_function(VALUE,const char*,VALUE(*)(ANYARGS),int);
                                                        ^
debase_internals.c:771:58: warning: incompatible pointer types passing 'void (VALUE, VALUE)' (aka 'void (unsigned long, unsigned long)') to parameter of type 'VALUE (*)()' (aka 'unsigned long (*)()') [-Wincompatible-pointer-types]
  rb_define_module_function(mDebase, "unset_iseq_flags", Debase_unset_trace_flags, 1);
                                                         ^~~~~~~~~~~~~~~~~~~~~~~~
/Users/runner/hostedtoolcache/Ruby/2.5.8/x64/include/ruby-2.5.0/ruby/ruby.h:1716:57: note: passing argument to parameter here
void rb_define_module_function(VALUE,const char*,VALUE(*)(ANYARGS),int);
                                                        ^
5 warnings and 2 errors generated.
make: *** [debase_internals.o] Error 1

make failed, exit code 2

Gem files will remain installed in /Users/runner/hostedtoolcache/Ruby/2.5.8/x64/lib/ruby/gems/2.5.0/gems/debase-0.2.4.1 for inspection.
Results logged to /Users/runner/hostedtoolcache/Ruby/2.5.8/x64/lib/ruby/gems/2.5.0/extensions/x86_64-darwin-19/2.5.0/debase-0.2.4.1/gem_make.out
Error: Process completed with exit code 1.

ruby-debug/debase#88 (comment) 👀

[kachick]

Thank you!