jetty / servlet-api dependency clash

[omarkilani]

I included unfiltered-scalatest in a project as a build dependency, which generated the following dependencyTree:

[info]     +-com.squareup.okhttp3:okhttp:4.9.0
[info]     | +-com.squareup.okio:okio:2.8.0
[info]     | | +-org.jetbrains.kotlin:kotlin-stdlib-common:1.4.0 (evicted by: 1.4.10)
[info]     | | +-org.jetbrains.kotlin:kotlin-stdlib-common:1.4.10
[info]     | | +-org.jetbrains.kotlin:kotlin-stdlib:1.4.0 (evicted by: 1.4.10)
[info]     | | +-org.jetbrains.kotlin:kotlin-stdlib:1.4.10
[info]     | |   +-org.jetbrains.kotlin:kotlin-stdlib-common:1.4.10
[info]     | |   +-org.jetbrains:annotations:13.0
[info]     | |  
[info]     | +-org.jetbrains.kotlin:kotlin-stdlib:1.4.10
[info]     |   +-org.jetbrains.kotlin:kotlin-stdlib-common:1.4.10
[info]     |   +-org.jetbrains:annotations:13.0
[info]     |  
[info]     +-org.scalatest:scalatest-core_2.13:3.2.3 [S]
[info]     | +-org.scala-lang.modules:scala-xml_2.13:1.2.0 (evicted by: 1.3.0)
[info]     | +-org.scala-lang.modules:scala-xml_2.13:1.3.0 [S]
[info]     | +-org.scala-lang:scala-reflect:2.13.4 [S]
[info]     | +-org.scalactic:scalactic_2.13:3.2.3 [S]
[info]     | | +-org.scala-lang:scala-reflect:2.13.4 [S]
[info]     | |
[info]     | +-org.scalatest:scalatest-compatible:3.2.3
[info]     |
[info]     +-ws.unfiltered:unfiltered-filter_2.13:0.12.0-SNAPSHOT [S]
[info]     | +-jakarta.servlet:jakarta.servlet-api:5.0.0 <-------------
[info]     | +-ws.unfiltered:unfiltered_2.13:0.12.0-SNAPSHOT [S]
[info]     |   +-commons-codec:commons-codec:1.15
[info]     |   +-org.scala-lang.modules:scala-xml_2.13:1.3.0 [S]
[info]     |   +-ws.unfiltered:unfiltered-util_2.13:0.12.0-SNAPSHOT [S]
[info]     |
[info]     +-ws.unfiltered:unfiltered-jetty_2.13:0.12.0-SNAPSHOT
[info]     | +-org.eclipse.jetty:jetty-webapp:11.0.0
[info]     | | +-org.eclipse.jetty:jetty-servlet:11.0.0
[info]     | | | +-org.eclipse.jetty:jetty-security:11.0.0
[info]     | | | | +-org.eclipse.jetty:jetty-server:11.0.0
[info]     | | | | | +-org.eclipse.jetty.toolchain:jetty-jakarta-servlet-api:5.0.1 <-------------

For whatever reason, org.eclipse.jetty:jetty-server depends on org.eclipse.jetty.toolchain:jetty-jakarta-servlet-api instead of jakarta.servlet:jakarta.servlet-api, which causes sbt-assembly to fail with:

build	10-Dec-2020 16:57:48	[error] /root/.cache/coursier/v1/https/repo1.maven.org/maven2/jakarta/servlet/jakarta.servlet-api/5.0.0/jakarta.servlet-api-5.0.0.jar:jakarta/servlet/AsyncContext.class
build	10-Dec-2020 16:57:48	[error] /root/.cache/coursier/v1/https/repo1.maven.org/maven2/org/eclipse/jetty/toolchain/jetty-jakarta-servlet-api/5.0.1/jetty-jakarta-servlet-api-5.0.1.jar:jakarta/servlet/AsyncContext.class
build	10-Dec-2020 16:57:48	[error] deduplicate: different file contents found in the following:
build	10-Dec-2020 16:57:48	[error] /root/.cache/coursier/v1/https/repo1.maven.org/maven2/jakarta/servlet/jakarta.servlet-api/5.0.0/jakarta.servlet-api-5.0.0.jar:jakarta/servlet/AsyncEvent.class
build	10-Dec-2020 16:57:48	[error] /root/.cache/coursier/v1/https/repo1.maven.org/maven2/org/eclipse/jetty/toolchain/jetty-jakarta-servlet-api/5.0.1/jetty-jakarta-servlet-api-5.0.1.jar:jakarta/servlet/AsyncEvent.class
build	10-Dec-2020 16:57:48	[error] deduplicate: different file contents found in the following:
build	10-Dec-2020 16:57:48	[error] /root/.cache/coursier/v1/https/repo1.maven.org/maven2/jakarta/servlet/jakarta.servlet-api/5.0.0/jakarta.servlet-api-5.0.0.jar:jakarta/servlet/AsyncListener.class
build	10-Dec-2020 16:57:48	[error] /root/.cache/coursier/v1/https/repo1.maven.org/maven2/org/eclipse/jetty/toolchain/jetty-jakarta-servlet-api/5.0.1/jetty-jakarta-servlet-api-5.0.1.jar:jakarta/servlet/AsyncListener.class
build	10-Dec-2020 16:57:48	[error] deduplicate: different file contents found in the following:
build	10-Dec-2020 16:57:48	[error] /root/.cache/coursier/v1/https/repo1.maven.org/maven2/jakarta/servlet/jakarta.servlet-api/5.0.0/jakarta.servlet-api-5.0.0.jar:jakarta/servlet/DispatcherType.class
build	10-Dec-2020 16:57:48	[error] /root/.cache/coursier/v1/https/repo1.maven.org/maven2/org/eclipse/jetty/toolchain/jetty-jakarta-servlet-api/5.0.1/jetty-jakarta-servlet-api-5.0.1.jar:jakarta/servlet/DispatcherType.class

Etc, etc.

I'm not sure how to solve this problem unless we change our dependency in Dependencies.scala to use org.eclipse.jetty.toolchain:jetty-jakarta-servlet-api instead.