tests: remove deprecated use of allows-prerelease

tests/fixtures/complete.toml

@@ -22,7 +22,7 @@ toml = "^0.9"
 # Dependencies with extras
 requests = { version = "^2.13", extras = [ "security" ] }
 # Python specific dependencies with prereleases allowed
-pathlib2 = { version = "^2.2", python = "~2.7", allows-prereleases = true }
+pathlib2 = { version = "^2.2", python = "~2.7", allow-prereleases = true }
 # Git dependencies
 cleo = { git = "https://github.com/sdispater/cleo.git", branch = "master" }
 

tests/installation/test_installer.py

@@ -890,7 +890,7 @@ def test_run_with_prereleases(installer, locker, repo, package):
     repo.add_package(package_a)
     repo.add_package(package_b)
 
-    package.add_dependency("A", {"version": "*", "allows-prereleases": True})
+    package.add_dependency("A", {"version": "*", "allow-prereleases": True})
     package.add_dependency("B", "^1.1")
 
     installer.update(True)

tests/installation/test_installer_old.py

@@ -861,7 +861,7 @@ def test_run_with_prereleases(installer, locker, repo, package):
     repo.add_package(package_a)
     repo.add_package(package_b)
 
-    package.add_dependency("A", {"version": "*", "allows-prereleases": True})
+    package.add_dependency("A", {"version": "*", "allow-prereleases": True})
     package.add_dependency("B", "^1.1")
 
     installer.update(True)