Fix up requirements=minimal

Makefile

@@ -79,7 +79,15 @@ install-dev:
 	set -xe && if [ "$$REQUIREMENTS" = "devel" ]; then \
 	    pip install -U --force-reinstall git+https://github.com/kennethreitz/requests; \
 	elif [ "$$REQUIREMENTS" = "minimal" ]; then \
-		pip install -U --force-reinstall lxml==3.1 requests==2.4.1 requests_toolbelt==0.4.0 click==5.0; \
+		# FIXME: Looking for a tool that parses setup.py requirements and installs minimum viable version
+		pip install -U --force-reinstall \
+			lxml==3.1 \
+			requests==2.0.1 \
+			requests_toolbelt==0.4.0 \
+			click-threading==0.1.2 \
+			click-log==0.1.3 \
+			atomicwrites==0.1.7 \
+			click==5.0; \
 	fi
 
 .PHONY: docs

setup.py

@@ -35,10 +35,10 @@ setup(
     install_requires=[
         # https://github.com/mitsuhiko/click/issues/200
         'click>=5.0',
-        'click-log',
-        'click-threading',
+        'click-log>=0.1.3',
+        'click-threading>=0.1.2',
         # https://github.com/kennethreitz/requests/issues/2930
-        'requests !=2.9.0',
+        'requests >=2.0.1, !=2.9.0',
         'lxml >=3.1' + (
             # See https://github.com/untitaker/vdirsyncer/issues/298
             # We pin some LXML version that is known to work with PyPy
@@ -49,8 +49,9 @@ setup(
             else ''
         ),
         # https://github.com/sigmavirus24/requests-toolbelt/pull/28
-        'requests_toolbelt >=0.5.0',
-        'atomicwrites>=0.1.6'
+        'requests_toolbelt >=0.3.0',
+        # https://github.com/untitaker/python-atomicwrites/commit/4d12f23227b6a944ab1d99c507a69fdbc7c9ed6d  # noqa
+        'atomicwrites>=0.1.7'
     ],
     extras_require={
         'remotestorage': ['requests-oauthlib']