update hexapdf

Gemfile.lock

@@ -271,10 +271,11 @@ GEM
       os (>= 0.9, < 2.0)
       signet (>= 0.16, < 2.a)
     hashdiff (1.1.2)
-    hexapdf (1.0.3)
+    hexapdf (1.4.0)
       cmdparse (~> 3.0, >= 3.0.3)
       geom2d (~> 0.4, >= 0.4.1)
       openssl (>= 2.2.1)
+      strscan (>= 3.1.2)
     htmlentities (4.3.4)
     httpclient (2.8.3)
     i18n (1.14.7)
@@ -548,6 +549,7 @@ GEM
     stringio (3.1.7)
     strip_attributes (1.14.1)
       activemodel (>= 3.0, < 9.0)
+    strscan (3.1.5)
     thor (1.4.0)
     timeout (0.4.3)
     trailblazer-option (0.1.2)