[#53] Add issue template for updating dependencies

.github/ISSUE_TEMPLATE/dependency.md

@@ -0,0 +1,20 @@
+---
+name: Dependency update
+about: Update existing dependency to a new version.
+title: ''
+labels: dependencies
+assignees: ''
+
+---
+
+For a Gradle dependency:
+1. Update the dependency version in the root `gradle.properties`.
+2. Update the dependency locks
+    1. For Gradle plugins `./gradlew dependencies --write-locks`
+    2. For module dependencies, we do not have locking enabled yet
+3. Are there any new APIs or possible migrations for this dependency?
+
+For Gradle itself:
+1. Update the Gradle version in `gradle/wrapper/gradle-wrapper.properties`
+2. Update the SHA version, referencing https://gradle.org/release-checksums/
+3. Update the Gradle wrapper by running `./gradlew wrapper`