Install psalm as dev, sync scripts updates

vendor/felixfbecker/language-server-protocol/src/InsertTextMode.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace LanguageServerProtocol;
+
+/**
+ * How whitespace and indentation is handled during completion
+ * item insertion.
+ *
+ * @since 3.16.0
+ */
+abstract class InsertTextMode
+{
+    /**
+     * The insertion or replace strings is taken as it is. If the
+     * value is multi line the lines below the cursor will be
+     * inserted using the indentation defined in the string value.
+     * The client will not apply any kind of adjustments to the
+     * string.
+     */
+    const AS_IS = 1;
+
+    /**
+     * The editor adjusts leading whitespace of new lines so that
+     * they match the indentation up to the cursor of the line for
+     * which the item is accepted.
+     *
+     * Consider a line like this: <2tabs><cursor><3tabs>foo. Accepting a
+     * multi line completion item is indented using 2 tabs and all
+     * following lines inserted will be indented using 2 tabs as well.
+     */
+    const ADJUST_INDENTATION = 2;
+}