Add max line length to .editorconfig

Change-Id: I9fc07ddf5dc7da119f5d060ae42c1ea2a86e0f63
Reviewed-on: https://fuchsia-review.googlesource.com/c/antlion/+/867712
Fuchsia-Auto-Submit: Sam Balana <sbalana@google.com>
Commit-Queue: Auto-Submit <auto-submit@fuchsia-infra.iam.gserviceaccount.com>
Reviewed-by: Jonathan Chang <jnchang@google.com>
diff --git a/.editorconfig b/.editorconfig
index d7d9cae..027bdb1 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -11,3 +11,4 @@
 charset = utf-8
 indent_style = space
 indent_size = 4
+max_line_length = 88