fix: Add shopt -s nullglob to dependencies script (#404)

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Source-Link: googleapis/synthtool@87254ac

Author: yoshi-automation

Diff for: .kokoro/dependencies.sh

@@ -14,6 +14,7 @@
 # limitations under the License.
 
 set -eo pipefail
+shopt -s nullglob
 
 ## Get the directory of the build script
 scriptDir=$(realpath $(dirname "${BASH_SOURCE[0]}"))

Diff for: synth.metadata

@@ -4,7 +4,7 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-monitoring-dashboards.git",
-        "sha": "e7a606f0cd93178d8958bfa713b9e0cf15dc09e5"
+        "sha": "41303df290105784ae8b8a2626ea02e30fc4aa54"
       }
     },
     {
@@ -19,7 +19,7 @@
       "git": {
         "name": "synthtool",
         "remote": "https://github.com/googleapis/synthtool.git",
-        "sha": "1c0c698705e668ccb3d68556ae7260f16ce63a6e"
+        "sha": "87254ac89a9559864c0a245d6b150406439ce3d8"
       }
     }
   ],