Update libmongoc to 1.18.0-alpha (#1216)

alcaeus · web-flow · commit b29806d0b86a · 2021-04-09T12:24:13.000+02:00
diff --git a/src/LIBMONGOC_VERSION_CURRENT b/src/LIBMONGOC_VERSION_CURRENT
@@ -1 +1 @@
-1.18.0-20210326+git203e6b9e26
+1.18.0-alpha
diff --git a/src/libmongoc b/src/libmongoc
@@ -1 +1 @@
-Subproject commit 203e6b9e26bfce6ca76f1d087470c3840318afdd
+Subproject commit 2ce8420892783331ef04b1e09b79facfc93f59c9
