Call .value outside of lambda

[fthomas]

To prevent errors like this:

.sbt/1.0/plugins/StewardPlugin.scala:38:49: The evaluation of `scalaVersion` inside an anonymous function is prohibited.
[error]
[error] Problem: Task invocations inside anonymous functions are evaluated independently of whether the anonymous function is invoked or not.
[error]
[error] Solution:
[error]   1. Make `scalaVersion` evaluation explicit outside of the function body if you don't care about its evaluation.
[error]   2. Use a dynamic task to evaluate `scalaVersion` and pass that value as a parameter to an anonymous function.
[error]
[error]             CrossVersion(moduleId.crossVersion, scalaVersion.value, scalaBinaryVersion.value)
[error]                                                 ^

[codecov]

Codecov Report

Merging #588 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #588   +/-   ##
=======================================
  Coverage   59.04%   59.04%           
=======================================
  Files          67       67           
  Lines         857      857           
  Branches       39       39           
=======================================
  Hits          506      506           
  Misses        351      351

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 288c35d...b5d81ba. Read the comment docs.