Bump to com.google.protobuf:protobuf-java:4.28.2

Part of bazelbuild#1482.

Bumps every Scala version up to use protobuf-java:4.28.2, to
preemptively avoid the following error produced by upcoming Scalafmt
updates:

```txt
$ bazel test --repo_env=SCALA_VERSION=2.11.12 //test/scalafmt/...

INFO: Analyzed 9 targets (80 packages loaded, 3307 targets configured).
ERROR: .../test/scalafmt/BUILD:43:20: ScalaFmt
  test/scalafmt/test/scalafmt/formatted/formatted-test.scala.fmt.output
  failed: Worker process did not return a WorkResponse:

---8<---8<--- Start of log, file at .../bazel-workers/worker-134-ScalaFmt.log ---8<---8<---
Exception in thread "main" java.lang.NoSuchMethodError:
  'boolean com.google.protobuf.GeneratedMessageV3.isStringEmpty(java.lang.Object)'
  [ ...snip... ]
```

This issue seemed to suggest a library bump may fix it, and it did:

- protocolbuffers/protobuf#9236

Fortunately, even though this is a major version bump from 3.10.0 to
4.28.2, there were no compatibility issues, per:

> Protobuf major version releases may also be backwards-compatible with
> the last release of the previous major version. See the release notice
> for more details.
>
> - https://github.com/protocolbuffers/protobuf/tree/main/java#compatibility-notice

third_party/repositories/scala_2_11.bzl

@@ -182,8 +182,8 @@ artifacts = {
         ],
     },
     "com_lihaoyi_fansi": {
-        "artifact": "com.lihaoyi:fansi_2.11:0.2.6",
-        "sha256": "63878260e23a1e28ecd8d6987d5feda9d72507b476137b9f642ac2c75035a9c8",
+        "artifact": "com.lihaoyi:fansi_2.11:0.4.0",
+        "sha256": "08f6400ff3e92fa3d215788fb3ef7bb7bf1344c71f4d4d4199fec9b0e6d91432",
         "deps": [
             "@com_lihaoyi_sourcecode",
             "@io_bazel_rules_scala_scala_library",
@@ -206,8 +206,8 @@ artifacts = {
         ],
     },
     "com_lihaoyi_sourcecode": {
-        "artifact": "com.lihaoyi:sourcecode_2.11:0.1.7",
-        "sha256": "33516d7fd9411f74f05acfd5274e1b1889b7841d1993736118803fc727b2d5fc",
+        "artifact": "com.lihaoyi:sourcecode_2.11:0.3.1",
+        "sha256": "52b38f0d291bab3555bd6b4324a1e86d1acbb347ffc763b154f220d7ce54f31b",
         "deps": [
             "@io_bazel_rules_scala_scala_library",
         ],