v0.14.2 (2019-04-15)

This is a minor release on the 0.14 series. It includes performance improvements and bug fixes:

• Improvements to how spack install handles foreground/background (#15723)
• Major performance improvements for reading the package DB (#14693, #15777)
• No longer check for the old index.yaml database file (#15298)
• Properly activate environments with '-h' in the name (#15429)
• External packages have correct .prefix in environments/views (#15475)
• Improvements to computing env modifications from sourcing files (#15791)
• Bugfix on Cray machines when getting TERM env variable (#15630)
• Avoid adding spurious LMOD env vars to Intel modules (#15778)
• Don't output [+] for mock installs run during tests (#15609)