Bump the acme version needed for account reuse (#6250)

* Bump the acme version needed for account reuse.

Fixes https://github.com/certbot/certbot/issues/6155#issuecomment-407122742.

* Update nginx oldest requirements.

* bump min acme version

* update min acme version

certbot-nginx/local-oldest-requirements.txt

@@ -1,2 +1,2 @@
-acme[dev]==0.25.0
+acme[dev]==0.26.0
 -e .[dev]

certbot-nginx/setup.py

@@ -7,7 +7,7 @@ version = '0.27.0.dev0'
 # Remember to update local-oldest-requirements.txt when changing the minimum
 # acme/certbot version.
 install_requires = [
-    'acme>=0.25.0',
+    'acme>=0.26.0',
     'certbot>=0.22.0',
     'mock',
     'PyOpenSSL',

local-oldest-requirements.txt

@@ -1 +1 @@
-acme[dev]==0.25.0
+acme[dev]==0.26.0

setup.py

@@ -32,7 +32,7 @@ version = meta['version']
 # specified here to avoid masking the more specific request requirements in
 # acme. See https://github.com/pypa/pip/issues/988 for more info.
 install_requires = [
-    'acme>=0.25.0',
+    'acme>=0.26.0',
     # We technically need ConfigArgParse 0.10.0 for Python 2.6 support, but
     # saying so here causes a runtime error against our temporary fork of 0.9.3
     # in which we added 2.6 support (see #2243), so we relax the requirement.