ignore phpstan reports about superfluous code

phpstan.neon

@@ -14,6 +14,14 @@ parameters:
     message: "#^Left side of || is always false.$#"
     count: 6
     path: lib/Client.php
+  -
+    message: "#^Else branch is unreachable because ternary operator condition is always true.$#"
+    count: 1
+    path: lib/Auth/Digest.php
+  -
+    message: "#^Strict comparison using !== between '' and non-empty-string will always evaluate to true.$#"
+    count: 1
+    path: lib/Auth/Digest.php
   -
     message: "#^Casting to string something that's already string.$#"
     count: 1
@@ -22,6 +30,10 @@ parameters:
     message: "#^Strict comparison using === between null and array<string, mixed> will always evaluate to false.$#"
     count: 1
     path: lib/functions.php
+  -
+    message: "#^Offset 'value' on array.* in isset\\(\\) always exists and is not nullable.$#"
+    count: 1
+    path: lib/functions.php
   -
     message: "#^.* will always evaluate to true\\.$#"
     count: 4