update certbot-dns-dnsimple snapcraft.yml.

update dnsimple snapcraft.yml

certbot-dns-dnsimple/snap/snapcraft.yaml

@@ -1,22 +1,24 @@
 name: certbot-dns-dnsimple
-version: script
-version-script: cd parts/certbot-dns-dnsimple/src && git describe|sed s/^v//
 summary: DNSimple DNS Authenticator plugin for Certbot
 description: TBC
 confinement: strict
 grade: devel
+base: core18
+adopt-info: certbot-dns-dnsimple
 
 parts:
   certbot-dns-dnsimple:
     plugin: python
-    source: git://github.com/certbot/certbot
-    source-branch: master
-    source-subdir: certbot-dns-dnsimple
+    source: .
+    constraints: [$SNAPCRAFT_PART_SRC/constraints.txt]
     python-version: python3
+    override-pull: |
+        snapcraftctl pull
+        snapcraftctl set-version `grep ^version $SNAPCRAFT_PART_SRC/setup.py | cut -f2 -d= | tr -d "'[:space:]"`
 
 slots:
   certbot:
     interface: content
     content: certbot-1
     read:
-      - $SNAP/lib/python3.5/site-packages
+      - $SNAP/lib/python3.6/site-packages