Update README (#271)

* Update README

* Add note about Scala 3

* One more version

README.md

@@ -14,20 +14,18 @@ into JVM build systems (see the [dhall-kubernetes] demonstration
 The core modules have no external dependencies, are Java 7-compatible, and are fairly minimal:
 
 ```bash
-$ du -h modules/core/target/dhall-core-0.4.1-SNAPSHOT.jar
-148K    modules/core/target/dhall-core-0.4.1-SNAPSHOT.jar
+$ du -h modules/core/target/dhall-core-0.9.0-M2.jar
+160K    modules/core/target/dhall-core-0.9.0-M2.jar
 
-$ du -h modules/parser/target/dhall-parser-0.4.1-SNAPSHOT.jar
-104K    modules/parser/target/dhall-parser-0.4.1-SNAPSHOT.jar
+$ du -h modules/parser/target/dhall-parser-0.9.0-M2.jar
+104K    modules/parser/target/dhall-parser-0.9.0-M2.jar
 ```
 
-There are also several [Scala][scala] modules that are published for Scala 2.12
-and 2.13. While most of the examples in this README are focused on Scala, you
+There are also several [Scala][scala] modules that are published for Scala 2.12,
+2.13, and 3.0. While most of the examples in this README are focused on Scala, you
 shouldn't need to know or care about Scala to use the core DhallJ modules.
 
-This project has been supported in part by [Permutive][permutive]. Please see our
-[monthly reports][permutive-medium] for updates on the work of the Permutive Community Engineering
-team.
+The initial development of this project was supported in part by [Permutive][permutive].
 
 ## Table of contents
 
@@ -43,10 +41,10 @@ team.
 
 ## Status
 
-The current release of this project supports [Dhall 17.0.0][dhall-17].
+The current release of this project supports [Dhall 20.2.0][dhall-20-2-0].
 We're running the [Dhall acceptance test suites][dhall-tests] for parsing, normalization,
 [CBOR][cbor] encoding and decoding, hashing, and type inference, and
-currently all tests are passing.
+currently all tests are passing (with one exception; see the [0.9.0-M2 release notes for details](https://github.com/travisbrown/dhallj/releases/tag/v0.9.0-M2)).
 
 There are several known issues:
 
@@ -64,7 +62,7 @@ The easiest way to try things out is to add the Scala wrapper module to your bui
 If you're using [sbt][sbt] that would look like this:
 
 ```scala
-libraryDependencies += "org.dhallj" %% "dhall-scala" % "0.4.0"
+libraryDependencies += "org.dhallj" %% "dhall-scala" % "0.9.0-M2"
 ```
 
 This dependency includes two packages: `org.dhallj.syntax` and `org.dhallj.ast`.
@@ -693,6 +691,7 @@ Copyright [Travis Brown][travisbrown] and [Tim Spence][timspence], 2020.
 [circe]: https://github.com/circe/circe
 [code-of-conduct]: https://www.scala-lang.org/conduct/
 [dhall-17]: https://github.com/dhall-lang/dhall-lang/releases/tag/v17.0.0
+[dhall-20-2-0]: https://github.com/dhall-lang/dhall-lang/releases/tag/v20.2.0
 [dhall-haskell]: https://github.com/dhall-lang/dhall-haskell
 [dhall-imports]: https://github.com/dhall-lang/dhall-lang/blob/master/standard/imports.md
 [dhall-json]: https://docs.dhall-lang.org/tutorials/Getting-started_Generate-JSON-or-YAML.html