Update README and PAPPL dependency to 1.2 or higher.

README.md

@@ -33,7 +33,7 @@ LPrint depends on:
 
 - A POSIX-compliant "make" program (both GNU and BSD make are known to work),
 - A C99 compiler (both Clang and GCC are known to work),
-- [PAPPL](https://www.msweet.org/pappl) 1.1 or later.
+- [PAPPL](https://www.msweet.org/pappl) 1.2 or later.
 - [CUPS](https://openprinting.github.io/cups) 2.2 or later (for libcups).
 
 
@@ -43,6 +43,8 @@ Supported Printers
 The following printers are currently supported:
 
 - DYMO LabelWriter printers
+- Seiko Instruments SLP printers
+- TSPL printers
 - Zebra/Eltron EPL2 printers
 - Zebra ZPL printers
 

configure

@@ -3739,15 +3739,15 @@ fi
 
 
 
-if $PKGCONFIG --exists pappl --atleast-version=1.1
+if $PKGCONFIG --exists pappl --atleast-version=1.2
 then :
 
     CFLAGS="$CFLAGS $($PKGCONFIG --cflags pappl)"
     LIBS="$LIBS $($PKGCONFIG --libs pappl)"
 
 else $as_nop
 
-    as_fn_error $? "PAPPL 1.1 or later is required for LPrint." "$LINENO" 5
+    as_fn_error $? "PAPPL 1.2 or later is required for LPrint." "$LINENO" 5
 
 fi
 

configure.ac

@@ -99,11 +99,11 @@ AC_PATH_TOOL([PKGCONFIG], [pkg-config])
 
 
 dnl PAPPL library...
-AS_IF([$PKGCONFIG --exists pappl --atleast-version=1.1], [
+AS_IF([$PKGCONFIG --exists pappl --atleast-version=1.2], [
     CFLAGS="$CFLAGS $($PKGCONFIG --cflags pappl)"
     LIBS="$LIBS $($PKGCONFIG --libs pappl)"
 ], [
-    AC_MSG_ERROR([PAPPL 1.1 or later is required for LPrint.])
+    AC_MSG_ERROR([PAPPL 1.2 or later is required for LPrint.])
 ])
 
 dnl CUPS library...