update installation instructions and tests to use 'ddev add-on get' (#6)

Author: Morgy93

README.md

@@ -28,10 +28,13 @@ YouTube: [Bun 1.0 is here](https://www.youtube.com/watch?v=BsnCpESUEqM)
 ## Installation
 
 ```shell
-ddev get Morgy93/ddev-bun
+ddev add-on get Morgy93/ddev-bun
 ddev restart
 ```
 
+> [!NOTE]
+> For DDEV versions prior to v1.23.5, use `ddev get` instead of `ddev add-on get`.
+
 ## Usage
 
 ```shell

tests/test.bats

@@ -26,17 +26,17 @@ teardown() {
 @test "install from directory" {
   set -eu -o pipefail
   cd ${TESTDIR}
-  echo "# ddev get ${DIR} with project ${PROJNAME} in ${TESTDIR} ($(pwd))" >&3
-  ddev get ${DIR}
+  echo "# ddev add-on get ${DIR} with project ${PROJNAME} in ${TESTDIR} ($(pwd))" >&3
+  ddev add-on get ${DIR}
   ddev restart
   health_checks
 }
 
 @test "install from release" {
   set -eu -o pipefail
   cd ${TESTDIR} || ( printf "unable to cd to ${TESTDIR}\n" && exit 1 )
-  echo "# ddev get ${DDEV_ADDON} with project ${PROJNAME} in ${TESTDIR} ($(pwd))" >&3
-  ddev get ${DDEV_ADDON}
+  echo "# ddev add-on get ${DDEV_ADDON} with project ${PROJNAME} in ${TESTDIR} ($(pwd))" >&3
+  ddev add-on get ${DDEV_ADDON}
   ddev restart >/dev/null
   health_checks
 }