message: Update nightly/clippy versions.
diff: @@ -52,13 +52,13 @@ matrix:
  - gnuplot
  - os: linux
  env: CLIPPY=yes
  - rust: nightly-2018-02-23
  + rust: nightly-2018-03-29
  - os: linux
  env: COVERAGE=yes GNUPLOT=yes
  sudo: required
  - os: linux
  env: RUSTFMT=yes
  - rust: nightly-2018-02-23
  + rust: nightly-2018-03-29
  - os: linux
  env: DOCS=yes
  - os: linux
  @@ -88,7 +88,7 @@ script:
  env:
  global:
  - - CLIPPY_VERSION=0.0.186
  + - CLIPPY_VERSION=0.0.190
  - secure: "f/HaMzQu7d6ochSjE5lUjJbXYWlhbzslyTuWq+Lub/r2TTL4hVlT9koC4RT7W73V3WDrwYIqEGmwvscVffnijZRebl/PV+6WlOlYJEdAgKxGROpFGDIJGRGAc/f3s6OcJ+Hr8rmRF70fYEl45hs6J53X8s+CVRuty+r/UdilRpM="
  branches:
  