Bump jackson-databind from 2.10.3 to 2.12.2

Bumps [jackson-databind](https://github.com/FasterXML/jackson) from 2.10.3 to 2.12.2.
- [Release notes](https://github.com/FasterXML/jackson/releases)
- [Commits](https://github.com/FasterXML/jackson/commits)

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

protocol/build.gradle.kts

@@ -47,7 +47,7 @@ kotlin {
                 implementation(project(":protocol"))
                 //todo: shouldn't be 2.10.3
                 implementation("com.fasterxml.jackson.core:jackson-core:2.12.2")
-                implementation("com.fasterxml.jackson.core:jackson-databind:2.10.3")
+                implementation("com.fasterxml.jackson.core:jackson-databind:2.12.2")
                 implementation("com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.12.2")
                 implementation("com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.12.2")
                 implementation("com.fasterxml.jackson.datatype:jackson-datatype-guava:2.12.2")