[emacs] update 4 drones

Update lib/diff-hl to  1.8.4-21-ga48699f
Update lib/helm    to v3.0-54-gb7ba8273
Update lib/ivy     to  0.10.0-483-g79543f3
Update lib/magit   to v2.90.1-27-g6c6462fb

diff --git a/lib/diff-hl b/lib/diff-hl
index 154c64a..a48699f 160000 (submodule)
--- a/lib/diff-hl
+++ b/lib/diff-hl
@@ -1 +1 @@
-Subproject commit 154c64affe7bdd16da814d198277d29bd1b6bb2a
+Subproject commit a48699f6c3ec38d912bfe78b88d2aae505b55b0a

diff --git a/lib/helm b/lib/helm
index b69eaf7..b7ba827 160000 (submodule)
--- a/lib/helm
+++ b/lib/helm
@@ -1 +1 @@
-Subproject commit b69eaf7b4bc511fba378309384a36c0217727d83
+Subproject commit b7ba827377190ddffbc4256863a8bca0aed8fdb6

diff --git a/lib/ivy b/lib/ivy
index 69856b6..79543f3 160000 (submodule)
--- a/lib/ivy
+++ b/lib/ivy
@@ -1 +1 @@
-Subproject commit 69856b62de8d1f148ff2a0f1d0a5543171ba5b50
+Subproject commit 79543f3e61a67f2830f88e96fe11d741b495c0f7

diff --git a/lib/magit b/lib/magit
index 01240e9..6c6462f 160000 (submodule)
--- a/lib/magit
+++ b/lib/magit
@@ -1 +1 @@
-Subproject commit 01240e9bda085566c528f921a5f5ab501864e0ef
+Subproject commit 6c6462fb25715090b1ad33e5d6d7b0fd406b0eb7