Update cats-core to 2.6.1

modules/common/js/src/main/scala/h4sm/common/AjaxAPI.scala

@@ -1,6 +1,6 @@
 package h4sm.common
 
-import cats.implicits._
+import cats.syntax.all._
 
 import io.circe.{Decoder, Encoder}
 import io.circe.syntax._

modules/db/jvm/src/main/scala/h4sm/db/config/DatabaseConfig.scala

@@ -2,7 +2,7 @@ package h4sm.db.config
 
 import scala.util.Try
 import cats.effect.Sync
-import cats.implicits._
+import cats.syntax.all._
 import javax.sql.DataSource
 import org.flywaydb.core.Flyway
 import org.flywaydb.core.api.FlywayException

modules/db/jvm/src/main/scala/h4sm/db/config/package.scala

@@ -1,7 +1,7 @@
 package h4sm.db
 
 import cats.{Applicative, ApplicativeError, Functor}
-import cats.implicits._
+import cats.syntax.all._
 import cats.mtl.{ApplicativeAsk, DefaultApplicativeAsk}
 import io.circe.Decoder
 import io.circe.config.parser

modules/features/comm/shared/src/test/scala/com/clovellytech/featurerequests/comm/arbitraries.scala

@@ -1,6 +1,4 @@
 package h4sm.featurerequests.comm
-
-import cats.implicits._
 import h4sm.featurerequests.comm.domain.features.FeatureRequest
 import h4sm.testutil.arbitraries._
 import org.scalacheck.Arbitrary

modules/testutil/common/jvm/src/main/scala/h4sm/testutil/InstantArbitrary.scala

@@ -1,6 +1,6 @@
 package h4sm.testutil
 
-import cats.implicits._
+import cats.syntax.all._
 import java.time.Instant
 import org.scalacheck.{Arbitrary, Gen}
 import org.scalacheck.cats.implicits._

modules/testutil/db/jvm/src/main/scala/h4sm/testutil/infrastructure/endpoints/ClientError.scala

@@ -3,7 +3,7 @@ package testutil.infrastructure.endpoints
 
 import org.http4s._
 import cats.effect.Sync
-import cats.implicits._
+import cats.syntax.all._
 
 sealed abstract class ClientError extends Throwable with Product with Serializable
 final case class UriError(message: String) extends ClientError

modules/testutil/db/jvm/src/main/scala/h4sm/testutil/transactor.scala

@@ -4,7 +4,7 @@ package testutil
 import java.sql.DriverManager
 
 import cats.effect.{Async, ContextShift, Sync}
-import cats.implicits._
+import cats.syntax.all._
 import doobie.util.transactor.Transactor
 import h4sm.db.config.DatabaseConfig
 import io.circe.config.parser

project/Dependencies.scala

@@ -30,7 +30,7 @@ object dependencies {
     val apacheLang3 = "3.11"
     val bcrypt = "3.1"
     val betterMonadicFor = "0.3.1"
-    val cats = "2.1.1"
+    val cats = "2.6.1"
     val catsScalacheck = "0.2.0.1"
     val catsMtl = "0.7.1"
     val catsEffect = "2.3.0"