Add Python 3.8 support

[Peque]

Just for testing purposes for now, to verify everything works fine with Python 3.8 before it is out (and potentially too late to ask for changes).

For now, it needs Travis to use 3.8-dev.

[codecov[bot]]

Codecov Report

Merging #325 into master will increase coverage by 0.01%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #325      +/-   ##
==========================================
+ Coverage   99.24%   99.25%   +0.01%     
==========================================
  Files          26       26              
  Lines        3573     3625      +52     
  Branches      259      262       +3     
==========================================
+ Hits         3546     3598      +52     
  Misses         14       14              
  Partials       13       13

Impacted Files	Coverage Δ
osbrain/tests/test_agent_sync_publications.py	100% <0%> (ø)	:arrow_up:
osbrain/tests/conftest.py	100% <0%> (ø)	:arrow_up:
osbrain/tests/test_address.py	100% <0%> (ø)	:arrow_up:
osbrain/tests/test_agent_pubsub_topics.py	100% <0%> (ø)	:arrow_up:
osbrain/tests/test_agent_serialization.py	100% <0%> (ø)	:arrow_up:
osbrain/tests/test_agent.py	100% <0%> (ø)	:arrow_up:
osbrain/proxy.py	100% <0%> (ø)	:arrow_up:
osbrain/tests/test_helper.py	100% <0%> (ø)	:arrow_up:
osbrain/tests/test_proxy.py	100% <0%> (ø)	:arrow_up:
osbrain/tests/test_common.py	100% <0%> (ø)	:arrow_up:
... and 6 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update c06bec2...30ed3f4. Read the comment docs.

[codecov[bot]]

Codecov Report

Merging #325 into master will increase coverage by 0.03%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #325      +/-   ##
==========================================
+ Coverage   99.24%   99.28%   +0.03%     
==========================================
  Files          25       25              
  Lines        3566     3618      +52     
  Branches      257      260       +3     
==========================================
+ Hits         3539     3592      +53     
+ Misses         15       14       -1     
  Partials       12       12

Impacted Files	Coverage Δ
osbrain/tests/test_agent_sync_publications.py	100% <0%> (ø)	:arrow_up:
osbrain/tests/test_address.py	100% <0%> (ø)	:arrow_up:
osbrain/tests/test_agent_pubsub_topics.py	100% <0%> (ø)	:arrow_up:
osbrain/tests/test_agent_serialization.py	100% <0%> (ø)	:arrow_up:
osbrain/tests/test_agent.py	100% <0%> (ø)	:arrow_up:
osbrain/tests/common.py	100% <0%> (ø)	:arrow_up:
osbrain/proxy.py	100% <0%> (ø)	:arrow_up:
osbrain/tests/test_helper.py	100% <0%> (ø)	:arrow_up:
osbrain/tests/test_proxy.py	100% <0%> (ø)	:arrow_up:
osbrain/tests/test_common.py	100% <0%> (ø)	:arrow_up:
... and 6 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update 912ea20...c3250d0. Read the comment docs.

[ocaballeror]

Both Travis and Appveyor support 3.8 now. You can remove the -dev from travis.yml and try this again.

[Peque]

@ocaballeror You are right, thanks for pointing out! :blush:

Pending review before merging.