Fixed const correctness

• Fixed ignored const corretness
• Updated README and platformio's manifest.

v2.2.0 Bug fixes and general improvements

• Differentiated between TM1637::setBrightness() and
  TM1637::changeBrightness(), the first sets the brightness without
  refreshing the display, the second does
• Added corresponding TM1637::setBrightnessPercent() and
  TM1637::changeBrightnessPercent() setting the brightness in percentage
  instead of indexes
• Animator::Reset() now resets the dot and the colons but not the
  animation. Use Animator::ResetAnimation() instead
• Added doxygen comments for ease-of-use
• TM1637's public routines now refresh and return the animator
• Added TM1637::setFloatDigitCount() allowing setting the number of
  decimal points

• Updated library manifest files

Fixed ESP32 String fractional number error

Solved compilation issues arising when compiling on an ESP32, due to the WString Constructor API change 6 months before. See here.

ESP min type issues, Nano TEST_MODE correction

v2.1.1

Solved ESP min() issue, Nano TEST_MODE conflicts

Decimal

Added Decimal as mentioned in issue #8.

Removed Debugging Serial print

v2.0.2

Version update

Doc update

v2.0.1

Updated keywords and library properties

General update

Added:

• Animation
• Raw data display

No ambiguity

Solved Issue #6 . Ambiguity error when compiling.
Updated README

v1.1.2

• Better doc