Update dependency androidx.test:core to v1.6.1

Author: renovate[bot]

build.gradle

@@ -7,7 +7,7 @@ buildscript {
         // Dependency versions
         androidXAppCompatVersion = "1.2.0"
         androidXWebKitVersion = "1.4.0"
-        androidXTestVersion = "1.3.0"
+        androidXTestVersion = "1.6.1"
         junitVersion = "4.13.2"
         robolectricVersion = '4.5.1'
     }