Update dependencies.

build.gradle.kts

@@ -1,14 +1,14 @@
 plugins {
-    kotlin("jvm") version "1.4.30"
+    kotlin("jvm") version "1.4.32"
     `java-gradle-plugin`
     `maven-publish`
     id("com.github.johnrengelman.shadow") version "6.1.0"
-    id("org.jmailen.kotlinter") version "3.3.0"
-    id("com.github.ben-manes.versions") version "0.36.0"
+    id("org.jmailen.kotlinter") version "3.4.0"
+    id("com.github.ben-manes.versions") version "0.38.0"
 }
 
 group = "com.github.cs125-illinois"
-version = "2021.2.1"
+version = "2021.3.0"
 
 repositories {
     mavenCentral()
@@ -18,9 +18,9 @@ dependencies {
     implementation(kotlin("stdlib"))
     implementation(kotlin("reflect"))
     implementation(gradleApi())
-    implementation("com.fasterxml.jackson.core:jackson-databind:2.11.3")
-    implementation("com.fasterxml.jackson.module:jackson-module-kotlin:2.11.3")
-    implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:2.11.3")
+    implementation("com.fasterxml.jackson.core:jackson-databind:2.12.2")
+    implementation("com.fasterxml.jackson.module:jackson-module-kotlin:2.12.2")
+    implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:2.12.2")
 }
 gradlePlugin {
     plugins {
@@ -34,3 +34,17 @@ java {
     sourceCompatibility = JavaVersion.VERSION_1_8
     targetCompatibility = JavaVersion.VERSION_1_8
 }
+tasks.dependencyUpdates {
+    resolutionStrategy {
+        componentSelection {
+            all {
+                if (listOf("alpha", "beta", "rc", "cr", "m", "preview", "b", "ea", "eap", "pr").any { qualifier ->
+                        candidate.version.matches(Regex("(?i).*[.-]$qualifier[.\\d-+]*"))
+                    }) {
+                    reject("Release candidate")
+                }
+            }
+        }
+    }
+    gradleReleaseChannel = "current"
+}