Add MutagenSync annotation to several commands (#129)

Author: weitzman

commands/web/expand-composer-json

@@ -6,6 +6,7 @@
 ## Usage: expand-composer-json [flags] [PROJECT_NAME]
 ## Example: "ddev expand-composer-json ctools"
 ## ExecRaw: true
+## MutagenSync: true
 
 set -eu -o pipefail
 

commands/web/phpstan

@@ -6,6 +6,7 @@
 ## Usage: phpstan [flags] [args]
 ## Example: "ddev phpstan" or "ddev phpstan -n"
 ## ExecRaw: true
+## MutagenSync: true
 
 set -eu -o pipefail
 

commands/web/poser

@@ -6,6 +6,7 @@
 ## Usage: poser [flags] [args]
 ## Example: "ddev poser" or "ddev poser --prefer-source"
 ## ExecRaw: true
+## MutagenSync: true
 
 set -eu -o pipefail