Upgrade scalac 3.x and Cats version built with it

Incorporates PRs
    - typelevel/pull/515
    - typelevel/pull/522
as they need to be done together.

.github/workflows/ci.yml

@@ -28,13 +28,13 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        scala: [3.0.2, 2.13.8, 2.12.15]
+        scala: [3.1.2, 2.13.8, 2.12.15]
         java: [temurin@8, temurin@11, temurin@17]
         project: [rootJS, rootJVM]
         exclude:
-          - scala: 3.0.2
+          - scala: 3.1.2
             java: temurin@11
-          - scala: 3.0.2
+          - scala: 3.1.2
             java: temurin@17
           - scala: 2.13.8
             java: temurin@11
@@ -224,22 +224,22 @@ jobs:
             ~/Library/Caches/Coursier/v1
           key: ${{ runner.os }}-sbt-cache-v2-${{ hashFiles('**/*.sbt') }}-${{ hashFiles('project/build.properties') }}
 
-      - name: Download target directories (3.0.2, rootJS)
+      - name: Download target directories (3.1.2, rootJS)
         uses: actions/download-artifact@v2
         with:
-          name: target-${{ matrix.os }}-${{ matrix.java }}-3.0.2-rootJS
+          name: target-${{ matrix.os }}-${{ matrix.java }}-3.1.2-rootJS
 
-      - name: Inflate target directories (3.0.2, rootJS)
+      - name: Inflate target directories (3.1.2, rootJS)
         run: |
           tar xf targets.tar
           rm targets.tar
 
-      - name: Download target directories (3.0.2, rootJVM)
+      - name: Download target directories (3.1.2, rootJVM)
         uses: actions/download-artifact@v2
         with:
-          name: target-${{ matrix.os }}-${{ matrix.java }}-3.0.2-rootJVM
+          name: target-${{ matrix.os }}-${{ matrix.java }}-3.1.2-rootJVM
 
-      - name: Inflate target directories (3.0.2, rootJVM)
+      - name: Inflate target directories (3.1.2, rootJVM)
         run: |
           tar xf targets.tar
           rm targets.tar

build.sbt

@@ -1,13 +1,13 @@
 import com.typesafe.tools.mima.core._
 
-val catsVersion = "2.7.0"
+val catsVersion = "2.8.0"
 val munitVersion = "0.7.29"
 val munitDisciplineVersion = "1.0.9"
 val scalacheckVersion = "1.15.4"
-val algebraVersion = "2.7.0"
+val algebraVersion = "2.8.0"
 val Scala212 = "2.12.15"
 val Scala213 = "2.13.8"
-val Scala3 = "3.0.2"
+val Scala3 = "3.1.2"
 
 ThisBuild / tlBaseVersion := "0.9"
 ThisBuild / startYear := Some(2015)