Add tests to sdist

Author: sdispater

.appveyor.yml

@@ -15,7 +15,8 @@ install:
   - "SET PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%"
 
   # Installing Poetry
-  - "curl -sSL https://raw.githubusercontent.com/sdispater/poetry/master/get-poetry.py | python"
+  - "curl -fsS -o get-poetry.py https://raw.githubusercontent.com/sdispater/poetry/master/get-poetry.py"
+  - "python get-poetry.py --preview -y"
   - "SET PATH=%USERPROFILE%\\.poetry\\bin;%PATH%"
 
   # Ensure latest pip in Poetry's virtualenv

.travis.yml

@@ -11,7 +11,8 @@ cache:
     - $HOME/.cache/pre-commit
 
 install:
-  - curl -sSL https://raw.githubusercontent.com/sdispater/poetry/master/get-poetry.py | python
+  - curl -fsS -o get-poetry.py https://raw.githubusercontent.com/sdispater/poetry/master/get-poetry.py
+  - python get-poetry.py --preview -y
   - source $HOME/.poetry/env
   - poetry install -v
 

pyproject.toml

@@ -10,6 +10,11 @@ readme = "README.md"
 homepage = "https://github.com/sdispater/tomlkit"
 repository = "https://github.com/sdispater/tomlkit"
 
+packages = [
+    {include = "tomlkit"},
+    {include = "tests", format = "sdist"}
+]
+
 [tool.poetry.dependencies]
 python = "~2.7 || ^3.4"