use RationalRoots representation

.travis.yml

@@ -1,5 +1,6 @@
 # Documentation: http://docs.travis-ci.com/user/languages/julia/
 language: julia
+
 os:
   - linux
   - osx
@@ -7,16 +8,29 @@ julia:
   - 1.0
   - 1.1
   - 1.2
+  - 1.3
   - nightly
+# env:
+#   - JULIA_NUM_THREADS=1
+#   - JULIA_NUM_THREADS=4
+
 notifications:
   email: false
 
 matrix:
-  allow_failures:
-  - julia: nightly
+ allow_failures:
+ - julia: nightly
 
-## uncomment the following lines to override the default test script
+codecov: true
+coveralls: true
 
-after_success:
-  # push coverage results to Codecov and Coveralls
-  - julia -e 'using Pkg; Pkg.add("Coverage"); using Coverage; Codecov.submit(Codecov.process_folder()); Coveralls.submit(Coveralls.process_folder())'
+# jobs:
+#   include:
+#     - stage: "Documentation"
+#       julia: 1.1
+#       os: linux
+#       script:
+#         - julia --project=docs/ -e 'using Pkg; Pkg.develop(PackageSpec(path=pwd()));
+#                                                 Pkg.instantiate()'
+#         - julia --project=docs/ docs/make.jl
+#       after_success: skip