Bump hamcrest from 2.1 to 2.2

Bumps [hamcrest](https://github.com/hamcrest/JavaHamcrest) from 2.1 to 2.2.
- [Release notes](https://github.com/hamcrest/JavaHamcrest/releases)
- [Changelog](https://github.com/hamcrest/JavaHamcrest/blob/master/CHANGES.md)
- [Commits](https://github.com/hamcrest/JavaHamcrest/compare/v2.1...v2.2)

Signed-off-by: dependabot[bot] <support@github.com>

uhabits-core/build.gradle.kts

@@ -60,7 +60,7 @@ kotlin {
                 implementation(kotlin("test"))
                 implementation(kotlin("test-junit"))
                 implementation("org.xerial:sqlite-jdbc:3.25.2")
-                implementation("org.hamcrest:hamcrest:2.1")
+                implementation("org.hamcrest:hamcrest:2.2")
                 implementation("nl.jqno.equalsverifier:equalsverifier:2.4.8")
                 implementation("org.apache.commons:commons-io:1.3.2")
                 implementation("com.nhaarman.mockitokotlin2:mockito-kotlin:2.2.0")