send both SCO and DEC proprietary sequence for terminal compatibility

[ndeloof]

fixes #4

[morikuni]

Thank you for the PR! The approach of sending both SCO and DEC sequences is correct.

However, there's an issue with the DEC escape sequences:

Current implementation:

Save = newAnsi(esc + "s" + esc + "7")      // ESC[s + ESC[7
Restore = newAnsi(esc + "u" + esc + "8")   // ESC[u + ESC[8

Problem: The DEC sequences should be ESC7 and ESC8, not ESC[7 and ESC[8. The esc constant is "\x1b[" (CSI - Control Sequence Introducer), but DEC sequences don't use CSI.

Correct implementation:

Save = newAnsi(esc + "s" + "\x1b7")       // ESC[s + ESC7
Restore = newAnsi(esc + "u" + "\x1b8")    // ESC[u + ESC8

Reference: https://en.wikipedia.org/wiki/ANSI_escape_code#Fp_Escape_sequences

[ndeloof]

my bad, fixed

[morikuni]

Thank you!

[morikuni]

Released https://github.com/morikuni/aec/releases/tag/v1.1.0