Modified the magic techfile "cifinput" section to always draw a pwell
layer under N diffusion and P tap.  This is not strictly necessary
but will prevent extraction errors when circuits are placed in a deep
nwell area.

VERSION

diff --git a/VERSION b/VERSION
index 4a063f1..86738f9 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.141
+1.0.142

sky130/magic/sky130.tech

diff --git a/sky130/magic/sky130.tech b/sky130/magic/sky130.tech
index 2d9527c..75c77c5 100644
--- a/sky130/magic/sky130.tech
+++ b/sky130/magic/sky130.tech
@@ -2282,9 +2282,13 @@
  variants *
  labels SUBPIN port
 
- # Always draw pwell under p-tap
- layer pwell TAP
+ # Always draw pwell under p-tap and n-diff.  This is not always
+ # necessary but works better with deep nwell for correct extraction.
+ layer pwell TAP,DIFF
  and-not NWELL
+ grow 130
+ grow 420
+ shrink 420
 
  # Always draw pwell in deep-nwell P-regions
  layer pwell DNWELL