update truth version to 1.1.3.3

remove guava

un-deprecate containsLines JavaFileObject

add CompileTester containsLines String JavaFileObject

remove hasExactContents, add contentsAsIterable

update javadoc

CompileTester: rename generatesSources to hasExactContents, add conta…

…insLines

fix test

add convenience overloads for generatesSources

add deprecation warnings for generatesSources, hasSourceEquivalentTo,…

… containsElementsIn