assertj-core updated to v3.10.0 (#13)
assertj-core updated to v3.10.0 (#13)

* EitherAssert initial version

* Javadoc updated

* EitherAssert_containsLeft/Right

* EitherAssert_containsSameRight

* EitherAssert_containsSameLeft

* WitherAssert_containsSameLeft/Right renamed

* Updated javadoc

* Not used constructor removed

* EitherAssert_containsRightInstanceOf

* Redundant throws removed

* EitherAssert_containsLeftInstanceOf

* Redundant Exception throws removed

* Javadoc updated

* EitherAssert_containsRight_usingComparator

* EitherAssert_containsLeft_usingComparator

* EitherAssert_containsRight_usingFieldByFieldValueComparator

* EitherAssert_containsLeft_usingFieldByFieldValueComparator

* Merge remote-tracking branch 'upstream/master'

# Conflicts:
#	src/main/java/org/assertj/vavr/api/AbstractEitherAssert.java
#	src/main/java/org/assertj/vavr/api/EitherAssert.java
#	src/main/java/org/assertj/vavr/api/EitherShouldContain.java

* TryAssert_contains_usingValueComparator_Test

* TryAssert_contains_usingFieldByFieldValueComparator_Test

* assertj-core dependency updated to v3.10.0

* Correct code formatting

* Correct code formatting

* Correct imports formatting

assertj/assertj-vavr