v0.0.1-techpreview2

Requires Nomad 0.11.0-beta2 or later.

IMPROVEMENTS:

• core: update Nomad API dependency to 0.11.0 [GH-85]
• plugin: return an error when Prometheus APM query returns NaN [GH-87]
• plugin: improve user experience when developing external plugins [GH-82]

BUG FIXES:

• plugin: allow the internal target-value plugin to handle scaling to zero as well as use target values of zero [GH-77]