Migrate to Drone (#78)

.drone.jsonnet

@@ -0,0 +1,52 @@
+local Pipeline(py_version) = {
+  kind: "pipeline",
+  name: "tests (Python " + py_version + ")",
+  steps: [
+    {
+      name: "test",
+      image: "python:" + py_version,
+      [if py_version == "2.7" then "failure" else null]: "ignore",
+      commands: [
+        "pip install .",
+        "pip install -r requirements-dev.txt",
+        "nosetests"
+      ]
+    }
+  ]
+};
+
+[
+  Pipeline("2.7"),
+  Pipeline("3.4"),
+  Pipeline("3.5"),
+  Pipeline("3.6"),
+  Pipeline("3.7"),
+  {
+    kind: "pipeline",
+    name: "upload release",
+    trigger: {
+      event: ['tag'],
+      status: ['success'],
+    },
+    depends_on: [
+      # We are ignoring 2.7 since it's randomly fails because of certificate_transparency module
+      "tests (Python 3.4)",
+      "tests (Python 3.5)",
+      "tests (Python 3.6)",
+      "tests (Python 3.7)",
+    ],
+    steps: [
+      {
+        name: "publish",
+        image: "plugins/pypi",
+        settings: {
+          distributions: ["sdist", "bdist_wheel"],
+          username: "Pr0Ger",
+          password: {
+            from_secret: "pypi_password"
+          },
+        },
+      },
+    ],
+  },
+]