Bump mozci from 1.3.0 to 1.4.0 (#1477)

Bumps [mozci]() from 1.3.0 to 1.4.0.

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

requirements.txt

@@ -6,7 +6,7 @@ libmozdata==0.1.65
 lmdb==0.98
 matplotlib==3.2.1
 microannotate==0.0.20
-mozci==1.3.0
+mozci==1.4.0
 numpy==1.18.2
 orjson==2.6.5
 pandas==1.0.3