switch to travis

.circleci/config.yml

-version: 2.1
-
-orbs:
-  python: circleci/python@0.2.1
-
-jobs:
-  build-and-test:
-    executor: python/default
-    steps:
-      - checkout
-      - python/load-cache
-      - python/install-deps
-      - python/save-cache
-      - run:
-          command: |
-            sudo python setup.py install
-          name: Install snakehouse
-      - run:
-          command: |
-            cd example
-            DEBUG=1 python setup.py test
-          name: Test
-
-workflows:
-  main:
-    jobs:
-      - build-and-test

.travis.yml

+language: python
+stages:
+  - name: test
+
+cache: pip
+before_script:
+  - python setup.py install
+script:
+  - cd example
+  - DEBUG=1 python setup.py test
+jobs:
+  include:
+    - stage: test
+      python: "3.5"
+    - stage: test
+      python: "3.6"
+    - stage: test
+      python: "3.7"
+    - stage: test
+      python: "3.8"
+    - stage: test
+      python: "3.9"
+    - stage: test
+      python: "pypy3.5"

README.md

 snakehouse
 ==========
-[![Build status](https://circleci.com/gh/smok-serwis/snakehouse.svg?style=shield)](https://github.com/smok-serwis/snakehouse)
+[![Build Status](https://travis-ci.com/smok-serwis/snakehouse.svg)](https://travis-ci.com/smok-serwis/snakehouse)
 [![Code Climate](https://codeclimate.com/github/smok-serwis/snakehouse/badges/gpa.svg)](https://codeclimate.com/github/smok-serwis/snakehouse)
 [![Issue Count](https://codeclimate.com/github/smok-serwis/snakehouse/badges/issue_count.svg)](https://codeclimate.com/github/smok-serwis/snakehouse)
 [![PyPI](https://img.shields.io/pypi/pyversions/snakehouse.svg)](https://pypi.python.org/pypi/snakehouse)