otp21: adapt get_stacktrace calls for OTP21

[fenollp]

Since a fix for #28 is coming up in final version of OTP 21 this month let's fix the compilation warnings ahead of time.

Said warnings:

===> Verifying dependencies...
===> Compiling parse_trans
src/parse_trans.erl:129: Warning: erlang:get_stacktrace/0: deprecated; use the new try/catch syntax for retrieving the stack backtrace
src/parse_trans.erl:326: Warning: erlang:get_stacktrace/0: deprecated; use the new try/catch syntax for retrieving the stack backtrace
src/parse_trans.erl:346: Warning: erlang:get_stacktrace/0: deprecated; use the new try/catch syntax for retrieving the stack backtrace
src/parse_trans.erl:737: Warning: erlang:get_stacktrace/0: deprecated; use the new try/catch syntax for retrieving the stack backtrace
src/parse_trans.erl:868: Warning: erlang:get_stacktrace/0: deprecated; use the new try/catch syntax for retrieving the stack backtrace
src/parse_trans.erl:874: Warning: erlang:get_stacktrace/0: deprecated; use the new try/catch syntax for retrieving the stack backtrace
src/parse_trans.erl:874: Warning: erlang:get_stacktrace/0: deprecated; use the new try/catch syntax for retrieving the stack backtrace

Note: I can move the line endings of all files from DOS to just \n with a simple command. Want me to open a PR with that? It would make git blame harder though.

[ferd]

@uwiger any way to get this merged & on hex?

[getong]

@fenollp I make a pr on your branch, and I think use OTP_REALSESE macro is much better.
fenollp#1 , use it if you like it.

[uwiger]

Sorry about the delay. It looks good, but I haven't had time to test it yet. I could merge on good faith, of course ... :-/

[fenollp]

Maybe it’s time to activate some free CI service ;)

[uwiger]

@fenollp absolutely! The main problem re. parse_trans is that there isn't much in terms of automated tests to run. I'd happily accept contributions in that area. ;-)

[fenollp]

@uwiger added a commit that adds TravisCI that just runs a compilation step. I ruled out R15 & R16 as these don't build.

You can see the build passing at https://travis-ci.org/fenollp/parse_trans/builds/403457699

I can bump the app's version if that's easier to publish to hex for you :)

[fenollp]

Tests pass!

[uwiger]

Thanks!

[uwiger]

Tagged with version 3.3.0 and published to hex