build(junit-hamcrest): limit the scopes to test (#61)

This commit limits the scope of the junit and hamcrest libraries so that the core library users don't run into version conflict issues for the testing suites.

Closes #60

pom.xml

@@ -64,6 +64,7 @@
  <groupId>junit</groupId>
  <artifactId>junit</artifactId>
  <version>4.13.2</version>
+ <scope>test</scope>
  </dependency>
  <dependency>
  <groupId>org.mockito</groupId>
@@ -81,6 +82,7 @@
  <groupId>org.hamcrest</groupId>
  <artifactId>hamcrest-all</artifactId>
  <version>1.3</version>
+ <scope>test</scope>
  </dependency>
  </dependencies>