List which Qt submodules are actually required

There are only three Qt submodules which we actually need and check for
in CMakeLists, namely: base (Qt5Widgets), declarative (Qt5Quick) and
tools (Qt5LinguistTools).

1 files changed, 4 insertions, 1 deletions

diff --git a/README.md b/README.md
index 676a3dc..28eb503 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,10 @@ To compile Twinkle you need the following libraries:
 * libsndfile
 * libmagic
 * libreadline
-* Qt 5
+* Qt 5 -- more specifically, the following submodules:
+  * base
+  * declarative
+  * tools
 
 ### Optional dependencies