add support and tests for python v3.7 and v3.8

Author: fitnr

.circleci/config.yml

@@ -1,6 +1,15 @@
-version: 1
+version: 2
+
+workflows:
+  version: 2
+  test:
+    jobs:
+      - test-3.6
+      - test-3.7
+      - test-3.8
+
 jobs:
-  build:
+  test-3.6: &test-template
     docker:
       - image: circleci/python:3.6
 
@@ -31,6 +40,12 @@ jobs:
             . venv/bin/activate
             pytest tests
 
-      - store_artifacts:
-          path: test-reports
-          destination: test-reports
+  test-3.7:
+    <<: *test-template
+    docker:
+      - image: circleci/python:3.7
+
+  test-3.8:
+    <<: *test-template
+    docker:
+      - image: circleci/python:3.8

setup.py

@@ -24,8 +24,13 @@
     author_email="kelvin@firststreet.org",
     license="MIT",
     classifiers=[
+        "License :: OSI Approved :: MIT License",
+        "Topic :: Scientific/Engineering",
+        "Topic :: Scientific/Engineering :: Hydrology",
         "Programming Language :: Python :: 3",
         "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
     ],
 
     # Package info