Merge ~hloeung/squid-reverseproxy-charm:master into squid-reverseproxy-charm:master

[Haw Loeung]

Updated dropping support for Bionic and Xenial; support for HTTPS on focal and later

Following on from comment on https://code.launchpad.net/~nick-moffitt/squid-reverseproxy-charm/+git/squid-reverseproxy-charm/+merge/444750

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

This merge proposal is being monitored by mergebot. Change the status to Approved to merge.

[🤖 Canonical IS Review Bot (canonical-is-reviewbot)]

Proxy approval for jsimpso

review: Approve

[🤖 Canonical IS Merge Bot (canonical-is-mergebot)]

Change successfully merged at revision 927884f4406c748acafb19c43e69b3282b70369c

diff --git a/charmcraft.yaml b/charmcraft.yaml
index 47cb96c..277eea4 100644
--- a/charmcraft.yaml
+++ b/charmcraft.yaml
@@ -6,13 +6,10 @@ bases:
         architectures: ["amd64"]
     run-on:
       - name: ubuntu
-        channel: "20.04"
-        architectures: ["amd64"]
-      - name: ubuntu
-        channel: "18.04"
+        channel: "22.04"
         architectures: ["amd64"]
       - name: ubuntu
-        channel: "16.04"
+        channel: "20.04"
         architectures: ["amd64"]
 parts:
   charm: