Support Python 3.9

- Update pip-tools to 5.5.0
- Update SciPy to 1.5.4
- Run tests for Python 3.9 on Travis CI
- Add Python 3.9 badge to README
- Update README to say support for Python 3.9
- Rearrange badge order

.travis.yml

@@ -2,6 +2,7 @@ language: python
 python:
   - "3.7"
   - "3.8"
+  - "3.9"
 install:
   - make dev
 script:

README.md

@@ -1,16 +1,15 @@
-![Python 3.7](https://badgen.net/badge/Python/3.7/purple)
-![Python 3.8](https://badgen.net/badge/Python/3.8/purple)
-[![Build Status](https://travis-ci.com/xofbd/unfair-coin-bayes.svg?branch=master)](https://travis-ci.com/xofbd/unfair-coin-bayes)
-[![Language grade: Python](https://img.shields.io/lgtm/grade/python/g/xofbd/unfair-coin-bayes.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/xofbd/unfair-coin-bayes/context:python)
-[![Language grade: Python](https://img.shields.io/lgtm/grade/python/g/xofbd/unfair-coin-bayes.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/xofbd/unfair-coin-bayes/context:python)
+![Python](https://shields.io/badge/Python-3.7%20%7C%203.8%20%7C%203.9-blue)
 [![GitHub release](https://img.shields.io/github/v/release/xofbd/unfair-coin-bayes.svg)](https://github.com/xofbd/unfair-coin-bayes/releases)
 [![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT)
+[![Build Status](https://travis-ci.com/xofbd/unfair-coin-bayes.svg?branch=master)](https://travis-ci.com/xofbd/unfair-coin-bayes)
+[![Language grade: Python](https://img.shields.io/lgtm/grade/python/g/xofbd/unfair-coin-bayes.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/xofbd/unfair-coin-bayes/context:python)
+[![Language grade: JavaScript](https://img.shields.io/lgtm/grade/javascript/g/xofbd/unfair-coin-bayes.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/xofbd/unfair-coin-bayes/context:javascript)
 
 # Unfair Coin Bayesian Simulation
 This repository creates a web app that simulates the evolving probability distribution of an unfair coin to come up heads using Bayes's theorem. The prior distribution is a Beta distribution with both shape parameters set to one, resulting in a uniform distribution. This repository is ready to deploy a web application using [Flask](https://flask.palletsprojects.com) and [Bokeh](https://bokeh.org) to Heroku. An example of the app can be seen at https://unfair-coin-bayes.herokuapp.com.
 
 ## Prerequisites
-You will need either Python 3.7 or 3.8. All required Python packages can be found in the `requirements.txt` file. You will also need a Heroku account and have installed the Heroku CLI. For more information on the Heroku CLI, go to https://devcenter.heroku.com/articles/heroku-cli#download-and-install.
+You will need either Python 3.7, 3.8, or 3.9. All required Python packages can be found in the `requirements.txt` file. You will also need a Heroku account and have installed the Heroku CLI. For more information on the Heroku CLI, go to https://devcenter.heroku.com/articles/heroku-cli#download-and-install.
 
 ## Running the app locally using Flask
 You may want to run the app using Flask locally before deploying it to Heroku, especially if you have made any changes to the code. To run locally:

requirements.txt

@@ -9,11 +9,11 @@ MarkupSafe==1.1.1
 numpy==1.19.4
 packaging==20.8
 Pillow==8.1.2
-pip-tools==5.3.1
+pip-tools==5.5.0
 pyparsing==2.4.7
 python-dateutil==2.8.1
 PyYAML==5.3.1
-scipy==1.5.0
+scipy==1.5.4
 six==1.15.0
 tornado==6.1
 Werkzeug==1.0.1

requirements/base.in

@@ -1 +1 @@
-pip-tools==5.3.1
+pip-tools==5.5.0

requirements/base.txt

@@ -4,9 +4,10 @@
 #
 #    pip-compile requirements/base.in
 #
-click==7.1.2              # via pip-tools
-pip-tools==5.3.1          # via -r requirements/base.in
-six==1.15.0               # via pip-tools
+click==7.1.2
+    # via pip-tools
+pip-tools==5.5.0
+    # via -r requirements/base.in
 
 # The following packages are considered to be unsafe in a requirements file:
 # pip

requirements/dev.txt

@@ -4,15 +4,31 @@
 #
 #    pip-compile requirements/dev.in
 #
-attrs==20.3.0             # via pytest
-flake8==3.8.4             # via -r requirements/dev.in
-iniconfig==1.1.1          # via pytest
-mccabe==0.6.1             # via flake8
-packaging==20.8           # via -c requirements/prod.txt, pytest
-pluggy==0.13.1            # via pytest
-py==1.10.0                # via pytest
-pycodestyle==2.6.0        # via flake8
-pyflakes==2.2.0           # via flake8
-pyparsing==2.4.7          # via -c requirements/prod.txt, packaging
-pytest==6.1.0             # via -r requirements/dev.in
-toml==0.10.2              # via pytest
+attrs==20.3.0
+    # via pytest
+flake8==3.8.4
+    # via -r requirements/dev.in
+iniconfig==1.1.1
+    # via pytest
+mccabe==0.6.1
+    # via flake8
+packaging==20.8
+    # via
+    #   -c requirements/prod.txt
+    #   pytest
+pluggy==0.13.1
+    # via pytest
+py==1.10.0
+    # via pytest
+pycodestyle==2.6.0
+    # via flake8
+pyflakes==2.2.0
+    # via flake8
+pyparsing==2.4.7
+    # via
+    #   -c requirements/prod.txt
+    #   packaging
+pytest==6.1.0
+    # via -r requirements/dev.in
+toml==0.10.2
+    # via pytest

requirements/prod.in

@@ -4,4 +4,4 @@ bokeh==1.0.4
 Flask==1.0
 Flask-WTF==0.14.3
 gunicorn==20.0.4
-scipy==1.5.0
+scipy==1.5.4

requirements/prod.txt

@@ -4,25 +4,61 @@
 #
 #    pip-compile requirements/prod.in
 #
-bokeh==1.0.4              # via -r requirements/prod.in
-click==7.1.2              # via -c requirements/base.txt, flask
-flask-wtf==0.14.3         # via -r requirements/prod.in
-flask==1.0                # via -r requirements/prod.in, flask-wtf
-gunicorn==20.0.4          # via -r requirements/prod.in
-itsdangerous==1.1.0       # via flask, flask-wtf
-jinja2==2.11.3            # via -c requirements/constraints.txt, bokeh, flask
-markupsafe==1.1.1         # via jinja2, wtforms
-numpy==1.19.4             # via bokeh, scipy
-packaging==20.8           # via bokeh
-pillow==8.1.2             # via -c requirements/constraints.txt, bokeh
-pyparsing==2.4.7          # via packaging
-python-dateutil==2.8.1    # via bokeh
-pyyaml==5.3.1             # via bokeh
-scipy==1.5.0              # via -r requirements/prod.in
-six==1.15.0               # via -c requirements/base.txt, bokeh, python-dateutil
-tornado==6.1              # via bokeh
-werkzeug==1.0.1           # via flask
-wtforms==2.3.3            # via flask-wtf
+bokeh==1.0.4
+    # via -r requirements/prod.in
+click==7.1.2
+    # via
+    #   -c requirements/base.txt
+    #   flask
+flask-wtf==0.14.3
+    # via -r requirements/prod.in
+flask==1.0
+    # via
+    #   -r requirements/prod.in
+    #   flask-wtf
+gunicorn==20.0.4
+    # via -r requirements/prod.in
+itsdangerous==1.1.0
+    # via
+    #   flask
+    #   flask-wtf
+jinja2==2.11.3
+    # via
+    #   -c requirements/constraints.txt
+    #   bokeh
+    #   flask
+markupsafe==1.1.1
+    # via
+    #   jinja2
+    #   wtforms
+numpy==1.19.4
+    # via
+    #   bokeh
+    #   scipy
+packaging==20.8
+    # via bokeh
+pillow==8.1.2
+    # via
+    #   -c requirements/constraints.txt
+    #   bokeh
+pyparsing==2.4.7
+    # via packaging
+python-dateutil==2.8.1
+    # via bokeh
+pyyaml==5.3.1
+    # via bokeh
+scipy==1.5.4
+    # via -r requirements/prod.in
+six==1.15.0
+    # via
+    #   bokeh
+    #   python-dateutil
+tornado==6.1
+    # via bokeh
+werkzeug==1.0.1
+    # via flask
+wtforms==2.3.3
+    # via flask-wtf
 
 # The following packages are considered to be unsafe in a requirements file:
 # setuptools