Update dotty 0.20.0-RC1

Author: ashawley

.circleci/config.yml

@@ -85,7 +85,7 @@ workflows:
       - scala_job:
           name: dotty-0.18
           java_version: jdk8
-          scala_version: 0.18.1-RC1
+          scala_version: 0.20.0-RC1
       - scala_job:
           name: jdk11_2.12
           java_version: jdk11
@@ -97,7 +97,7 @@ workflows:
       - scala_job:
           name: jdk11_dotty
           java_version: jdk11
-          scala_version: 0.18.1-RC1
+          scala_version: 0.20.0-RC1
       - scalajs_job:
           name: sjs0.6_2.12
           scala_version: 2.12.10

.travis.yml

@@ -7,7 +7,7 @@ jdk:
   - openjdk11
 
 scala:
-  - 0.18.1-RC1
+  - 0.20.0-RC1
   - 2.12.10
   - 2.13.1
 
@@ -23,9 +23,9 @@ matrix:
       env: SCALAJS_VERSION=0.6.29
     - jdk: openjdk11
       env: SCALAJS_VERSION=1.0.0-M8
-    - scala: 0.18.1-RC1
+    - scala: 0.20.0-RC1
       env: SCALAJS_VERSION=0.6.31
-    - scala: 0.18.1-RC1
+    - scala: 0.20.0-RC1
       env: SCALAJS_VERSION=1.0.0-M8
 
 install: