[emacs] update 4 drones

lib/magit                   master                     2.13.0-383-gdc0a2e70
lib/org                     master                    release_9.1.14-1023-g503a1d4d9
lib/slack                   master                    ef3956a
lib/web-mode                master                    v16-45-g29ced99

diff --git a/lib/magit b/lib/magit
index af4bf8d..dc0a2e7 160000 (submodule)
--- a/lib/magit
+++ b/lib/magit
@@ -1 +1 @@
-Subproject commit af4bf8df892af62d7660ceeb6f55545f7e33434c
+Subproject commit dc0a2e7032a596851f0c71c223e1552c13320404

diff --git a/lib/org b/lib/org
index 6e51b42..503a1d4 160000 (submodule)
--- a/lib/org
+++ b/lib/org
@@ -1 +1 @@
-Subproject commit 6e51b42e164df978df66580b0ca82b4fc84c7e0e
+Subproject commit 503a1d4d94fba7adeda50fcb1bf411285d566af6

diff --git a/lib/slack b/lib/slack
index 2e96859..ef3956a 160000 (submodule)
--- a/lib/slack
+++ b/lib/slack
@@ -1 +1 @@
-Subproject commit 2e968590bdd3ba7474b5d6260910d821607b21a5
+Subproject commit ef3956a80c5521b5fb91e65947ab0af40222b10d

diff --git a/lib/web-mode b/lib/web-mode
index 6f70ee0..29ced99 160000 (submodule)
--- a/lib/web-mode
+++ b/lib/web-mode
@@ -1 +1 @@
-Subproject commit 6f70ee0cd7da3677ea1846ab7d7383b628e41e4e
+Subproject commit 29ced993bb1a435bd82d3e7395bed13b99e87de4