Remove allow_prereleases=true from Pipfile

This avoids `piping update` allowing packages other than Black to be installed from pre-release candidates prior to either one of these issues being resolved: pypa/pipenv#1760 psf/black#517 This commit back-levels pyyaml to the last release along with the coverage developer tool and locks all current non-major updates.
LibraryOfCongress · Jan 22, 2019 · ad0ea40 · ad0ea40
1 parent 3d48d07
commit ad0ea40
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Showing 2 changed files with 197 additions and 193 deletions.
diff --git a/Pipfile b/Pipfile
@@ -46,7 +46,7 @@ kombu = ">=4.2.2<4.3.0"
 [dev-packages]
 invoke = "*"
 django-extensions = "*"
-black = "*"
+black = "==18.9b0"
 isort = "*"
 django-debug-toolbar = "*"
 "flake8" = "*"
@@ -57,6 +57,3 @@ cfn-lint = "*"
 
 [requires]
 python_version = "3.6"
-
-[pipenv]
-allow_prereleases = true