add ProgressMeter extension module

[marius311]

Fixes #59

E.g.

julia> using ProgressMeter, OhMyThreads

julia> @showprogress tmap(i -> (sleep(0.1); i^2), 1:10)
Progress: 100%|██████████████████| Time: 0:00:00
10-element Vector{Int64}:
...

I have a test file I used that basically does that command for everything, but I didn't commit since it didn't feel right, but let me know.

Note the use of ::Function (rather than ::Callable) just matches what ProgressMeter does to avoid any ambiguities.

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@@            Coverage Diff             @@
##           master     #164      +/-   ##
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- Coverage   90.24%   89.67%   -0.58%     
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[carstenbauer]

Thanks for the PR! Can we add some tests for this somehow?

[marius311]

Done.

[carstenbauer]

Needs an entry in CHANGELOG.md

[MasonProtter]

Very nice, thank you! Is there a way to make ProgressMeter.jl understand @tasks as well? Im guessing not, but thought I should ask.

[marius311]

Added changelog. On @tasks yea there's no super clean way I'd say, @showprogress expects the map-like call as the first and only expression. I suppose one avenue might be to try and PR that package so that it looks at the final expression in the block it gets, which might a reasonable assumption, and then would immediately work here since the last expression is the tforeach which now works. But yea otherwise I'd say beyond this scope.

julia> @macroexpand @tasks for i=1:10; sleep(0.1); end
:(let
      #= /Users/marius/work/ohmythreads_progress/OhMyThreads/src/macro_impl.jl:127 =#
      begin
          #= /Users/marius/work/ohmythreads_progress/OhMyThreads/src/macro_impl.jl:103 =#
          begin
              #= /Users/marius/work/ohmythreads_progress/OhMyThreads/src/macro_impl.jl:260 =#
          end
          #= /Users/marius/work/ohmythreads_progress/OhMyThreads/src/macro_impl.jl:104 =#
          begin
              #= /Users/marius/work/ohmythreads_progress/OhMyThreads/src/macro_impl.jl:280 =#
          end
          #= /Users/marius/work/ohmythreads_progress/OhMyThreads/src/macro_impl.jl:105 =#
          nothing
          #= /Users/marius/work/ohmythreads_progress/OhMyThreads/src/macro_impl.jl:106 =#
          local function var"#1#mapping_function"(i)
                  #= /Users/marius/work/ohmythreads_progress/OhMyThreads/src/macro_impl.jl:71 =#
                  #= /Users/marius/work/ohmythreads_progress/OhMyThreads/src/macro_impl.jl:72 =#
                  begin
                      #= REPL[6]:1 =#
                      sleep(0.1)
                      #= REPL[6]:1 =#
                  end
              end
          #= /Users/marius/work/ohmythreads_progress/OhMyThreads/src/macro_impl.jl:107 =#
          OhMyThreads.tforeach(var"#1#mapping_function", 1:10; )
      end
  end)

julia> @macroexpand @showprogress @tasks for i=1:10; sleep(0.1); end
ERROR: ArgumentError: Final argument to @showprogress must be a for loop, comprehension, or a map-like function; got #= REPL[7]:1 =# @tasks for i = 1:10
        #= REPL[7]:1 =#
        sleep(0.1)
        #= REPL[7]:1 =#
    end