Use dev-requirements.txt instead of Pipfile

So, using pipenv is a COMPLETE waste of time for libraries. I had gotten
caught up in the hype and decided to try to use pipenv for natsort.
Turns out I was just adding a needless dependency for developers.

3 files changed, 10 insertions, 13 deletions

diff --git a/Pipfile b/Pipfile
deleted file mode 100644
index cbf6089..0000000
--- a/Pipfile
+++ /dev/null
@@ -1,11 +0,0 @@
-[dev-packages]
-coverage            = "*"
-pytest              = ">=3.5"
-pytest-cov          = "*"
-pytest-mock         = ">=1.1"
-hypothesis          = ">=3.8.0"
-pytest-faulthandler = {version = "*", platform_python_implementation = "== 'CPython'"}
-semver              = "*"
-
-# These packages are standard on newer python versions.
-pathlib = {version = "*", python_version = "< '3.4'"}
diff --git a/dev-requirements.txt b/dev-requirements.txt
new file mode 100644
index 0000000..e9af60b
--- /dev/null
+++ b/dev-requirements.txt
@@ -0,0 +1,9 @@
+coverage
+pytest >= 3.5
+pytest-cov
+pytest-mock >= 1.1
+hypothesis >= 3.8.0
+pytest-faulthandler; platform_python_implementation == 'CPython'
+semver
+# These packages are standard on newer python versions.
+pathlib; python_version < '3.4'
diff --git a/tox.ini b/tox.ini
index 558fcc5..0e1e6ff 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,11 +18,10 @@ skip_missing_interpreters =
 passenv =
     WITH_EXTRAS
 deps =
-    pipenv
+    -r dev-requirements.txt
 extras =
     {env:WITH_EXTRAS:}
 commands =
-    pipenv install --dev --skip-lock
     # Only run How It Works doctest on Python 3.6.
     py36: {envpython} -m doctest -o IGNORE_EXCEPTION_DETAIL docs/howitworks.rst
     # Other doctests are run for all pythons.