Ignores ESM migration commit from git blame and GitHub history by default.

dgp1130 · dgp1130 · commit 4bcda83431be · 2023-03-04T00:32:51.000-08:00
Refs #33. This was a very large commit which touched basically every TypeScript and BUILD file in the repo in a purely mechanical fashion, so hiding it simplifies history a bit.
diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
@@ -0,0 +1,2 @@
+# ESM migration.
+71ebac2ad2217caf45d447026b7cb89f10f85dbf

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+# ESM migration.`
	`2`	`+71ebac2ad2217caf45d447026b7cb89f10f85dbf`