Echo Nukleus Specification 0.21

<!-- https://jarcasting.com/artifacts/org.reaktivity/nukleus-echo.spec/ -->
<dependency>
    <groupId>org.reaktivity</groupId>
    <artifactId>nukleus-echo.spec</artifactId>
    <version>0.21</version>
</dependency>

// https://jarcasting.com/artifacts/org.reaktivity/nukleus-echo.spec/
implementation 'org.reaktivity:nukleus-echo.spec:0.21'

// https://jarcasting.com/artifacts/org.reaktivity/nukleus-echo.spec/
implementation ("org.reaktivity:nukleus-echo.spec:0.21")

'org.reaktivity:nukleus-echo.spec:jar:0.21'

<dependency org="org.reaktivity" name="nukleus-echo.spec" rev="0.21">
  <artifact name="nukleus-echo.spec" type="jar" />
</dependency>

@Grapes(
@Grab(group='org.reaktivity', module='nukleus-echo.spec', version='0.21')
)

libraryDependencies += "org.reaktivity" % "nukleus-echo.spec" % "0.21"

[org.reaktivity/nukleus-echo.spec "0.21"]