Build failure on OTP 22

[tmcgilchrist]

Due to the deprecation of erlang:get_stack_trace() erlang/otp#1783

===> Compiling _build/default/lib/clique/src/clique_test_group_leader.erl failed
_build/default/lib/clique/src/clique_test_group_leader.erl:118: erlang:get_stacktrace/0: deprecated; use the new try/catch syntax for retrieving the stack backtrace

The simple fix is to update the catch to the new try/catch syntax but that'll break older versions. Otherwise adding an ignore deprecations flag to the project should work.

    try apply(M, F, A) of
        Chars ->
            io_request({put_chars, Chars}, State)
    catch C:T:S ->
            {{error, {C,T, S}}, State}
    end;