jackson: Update to 2.9.10 (and jackson-databind to 2.9.10.1)

Problem / Solution

We want to upgrade to the latest version of jackson that we can, yet
at this time upgrading to jackson 2.10 is problematic. Let's upgrade
instead to the latest 2.9 version - 2.9.10.1.

JIRA Issues: CSL-9183

Differential Revision: https://phabricator.twitter.biz/D410846

CHANGELOG.rst

@@ -7,6 +7,8 @@ Note that ``PHAB_ID=#`` and ``RB_ID=#`` correspond to associated messages in com
 Unreleased
 ----------
 
+* Upgrade to jackson 2.9.10 and jackson-databind 2.9.10.1 ``PHAB_ID=D410846``
+
 * Multiple changes have happened around query parameter retrieval in order
   to remove duplicated functionality from Twitter Server that exists in
   Finagle. Users are encouraged to use finagle-http's `Uri` class within their

build.sbt

@@ -4,9 +4,10 @@ import scoverage.ScoverageKeys
 val releaseVersion = "19.12.0-SNAPSHOT"
 
 val jacksonVersion = "2.9.9"
+val jacksonDatabindVersion = "2.9.10.1"
 val jacksonLibs = Seq(
   "com.fasterxml.jackson.core" % "jackson-core" % jacksonVersion,
-  "com.fasterxml.jackson.core" % "jackson-databind" % jacksonVersion,
+  "com.fasterxml.jackson.core" % "jackson-databind" % jacksonDatabindVersion,
   "com.fasterxml.jackson.module" %% "jackson-module-scala" % jacksonVersion exclude("com.google.guava", "guava")
 )
 val opencensusVersion = "0.19.1"