builds: add gnupg in preparation of gpg integration

This is required for future gpg unit tests to run.

Signed-off-by: Robin Jarry <robin@jarry.cc>

.builds/alpine-edge.yml

@@ -2,6 +2,7 @@
 image: alpine/edge
 packages:
   - go
+  - gnupg
   - notmuch-dev
   - scdoc
 sources:

.builds/debian-stable.yml

@@ -2,6 +2,7 @@
 image: debian/stable
 packages:
   - golang
+  - gnupg2
   - libnotmuch-dev
   - scdoc
 sources:

.builds/fedora-latest.yml

@@ -2,6 +2,7 @@
 image: fedora/latest
 packages:
   - golang
+  - gnupg2
   - notmuch-devel
   - scdoc
 sources:

.builds/openbsd.yml

@@ -2,6 +2,7 @@
 image: openbsd/latest
 packages:
   - go
+  - gnupg
   - scdoc
 sources:
   - "https://git.sr.ht/~rjarry/aerc"

.github/workflows/macos.yml

@@ -10,7 +10,7 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - uses: actions/setup-go@v2
-      - run: brew install notmuch scdoc
+      - run: brew install gnupg notmuch scdoc
       - run: make
       - run: make install
       - run: make checkinstall