utest v0.6.6

• #180 Add support for 2.13.0-M5
• #178 Use portable-scala-reflect instead of the deprecated TestUtils.
• #179 Upgrades

    Scala 2.10.7.
    Scala.js 0.6.25 and 1.0.0-M5
    Scala Native 0.3.7
    sbt-crossproject 0.6.0

NOTE: There is no release for Scala.js v1.0.0-M5 on Scala 2.13.0-M5

utest v0.6.3

• #137 Add support for Scala.js 1.0.0-M2, by @sjrd