Update to Psalm 4

.phive/phars.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <phive xmlns="https://phar.io/phive">
   <phar name="php-cs-fixer" version="^2.15" installed="2.16.4" location="./tools/php-cs-fixer" copy="true"/>
-  <phar name="psalm" version="^3.2" installed="3.18.2" location="./tools/psalm" copy="true"/>
+  <phar name="psalm" version="^4.0" installed="4.0.1" location="./tools/psalm" copy="true"/>
   <phar name="roave/backwardcompatibilitycheck" version="^5.0.0" installed="5.0.0" location="./tools/roave-backward-compatibility-check" copy="true"/>
 </phive>

.psalm/baseline.xml

@@ -1,15 +1,9 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<files psalm-version="3.16@d03e5ef057d6adc656c0ff7e166c50b73b4f48f3">
+<files psalm-version="4.0.1@b1e2e30026936ef8d5bf6a354d1c3959b6231f44">
   <file src="src/ReflectionMapper.php">
-    <InvalidCast occurrences="1">
-      <code>$returnType</code>
-    </InvalidCast>
     <MixedArgument occurrences="1">
       <code>$returnType instanceof ReflectionUnionType</code>
     </MixedArgument>
-    <MixedAssignment occurrences="1">
-      <code>$type</code>
-    </MixedAssignment>
     <RedundantConditionGivenDocblockType occurrences="1">
       <code>assert($returnType instanceof ReflectionUnionType)</code>
     </RedundantConditionGivenDocblockType>

.psalm/config.xml

@@ -3,6 +3,7 @@
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns="https://getpsalm.org/schema/config"
     xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+    resolveFromConfigFile="false"
     errorBaseline=".psalm/baseline.xml"
     totallyTyped="true"
 >