Using Travis CI for `3.10`

Passing build: https://app.travis-ci.com/github/Montana/thug/builds/271584986

I thought this could be good to have more CI/CD coverage. I really appreciate it @buffer!

This is the .travis.yml I put together for thug:

language: python
dist: focal
os: linux

jobs:
  include:
    - name: "Build and test Thug (Python 3.10)"
      python: 3.10

before_install:
  - sudo apt-get update
  - sudo apt-get install -y python3 python3-dev python-is-python3
  - sudo apt-get install -y build-essential clang systemtap-sdt-dev
  - sudo apt-get install -y libfuzzy-dev graphviz libgraphviz-dev tesseract-ocr unrar xfonts-base xfonts-75dpi
  - wget https://github.com/wkhtmltopdf/packaging/releases/download/0.12.6-1/wkhtmltox_0.12.6-1.bionic_amd64.deb
  - sudo dpkg -i wkhtmltox_0.12.6-1.bionic_amd64.deb

install:
  - git clone https://github.com/buffer/libemu.git
  - cd libemu
  - autoreconf -v -i
  - ./configure
  - sudo make install
  - cd -
  - sudo ldconfig

  - pip install --upgrade pip
  - pip install tox tox-gh-actions
  - pip install appdirs

  - sudo mkdir -p /etc/thug/
  - sudo cp -R thug/conf/* /etc/thug/

before_script:
  - sudo swapoff -a
  - sudo sysctl -w vm.swappiness=1
  - sudo sysctl -w fs.file-max=262144
  - sudo sysctl -w vm.max_map_count=262144

  - wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-8.8.0-linux-x86_64.tar.gz
  - tar -xzf elasticsearch-8.8.0-linux-x86_64.tar.gz
  - elasticsearch-8.8.0/bin/elasticsearch -d

script:
  - tox

after_success:
  - bash <(curl -s https://codecov.io/bash) -t $CODECOV_TOKEN

Seems to work like a charm.

buffer / thug

Using Travis CI for `3.10` #381